The drink of the people at large in Japan is green tea. The preparation of good tea is regarded by the Japanese as the height of
social art. For that reason, it is an important element in the domestic, political, and general life of the country.
Tea is the beverage--the masterpiece-of every meal, even if it be nothing but boiled rice. Every artisan and laborer, going to work,
carries a rice-box of lacquered wood, a kettle, a tea-caddy, a tea-pot, a cup, and chop-sticks. Milk and sugar are generally avoided. The
Japanese and the Chinese never indulge in either of these ingredients in tea. The use of these, they claim, spoils the delicate aroma.
From the highest court circles down to the lowliest and poorest of the Emperor's subjects, it is the custom in both Japan and China to
offer tea to every visitor upon his or her arrival. Not to do this would be an unpardonable breach of national manners. Even in the shops,
the customer is offered a soothing cup before the goods are displayed.
The Japanese believe that visitors to their homes are entitled to the best entertainment possible. As soon as a guest is seated upon a
mat, a small tray is set before the master of the house. Upon this tray is a tiny tea-pot with a handle at right angles to the spout. Other
parts of this outfit include a highly artistic tea-kettle filled with hot water, and a number of small cups, set in metal or bamboo trays. These
trays are used for handing the cups around, but the guest is not expected to take one. The cups being without handles, are not easy to
hold. The visitor must therefore be careful lest he or she let one slip through untutored fingers.
The tea-pot is drenched with hot water before the tea is put in. Then, more hot water is poured over the leaves, and soon poured off
into the cups. This is repeated several times. The hot water is never allowed to stand on the grounds over a minute.
The Japanese all adhere to the general household custom of the country in keeping the necessary tea apparatus in readiness. In the
Which two details should be included in a summary of the passage?
0 The Japanese offer tea to their guests in small cups placed on metal or bamboo trays.
0
The Japanese believe that preparing tea is a form of art, and they follow specific methods to
prepare and present the tea.
In Japan and China, tea is always served in highly artistic tea-kettles, cups, and tea-caddies.
110
The Japanese serve tea by placing the tea cups in the visitors' hands so that the visitors do
not accidently drop the tea cups.
0
In Japan and China, serving tea to visitors in shops and homes is an extremely important
practice of social and political life.
2 of 10 Answered
Session Timon 2.₁
Tools
Sa

Answers

Answer 1

Tea is offered to every visitor as a sign of hospitality, and not offering tea would be considered impolite.

What is circle?

A circle is a two-dimensional shape that is defined as a set of all points in a plane that are equidistant from a fixed point called the center. The distance between the center and any point on the circle is called the radius, which is a constant value for all points on the circle.

A circle can be represented by its center point and radius or by its diameter, which is the distance across the circle passing through its center. Circles have several important properties, such as their circumference (the distance around the outside of the circle), their area (the amount of space enclosed by the circle), and their diameter (the longest distance across the circle).

Circles are used in many areas of mathematics, physics, engineering, and other sciences. They are also used in everyday life, such as in the design of round objects like wheels and in the creation of circular patterns in art and architecture.

Based on the passage, the two details that should be included in a summary are:

The Japanese believe that preparing tea is a form of art, and they follow specific methods to prepare and present the tea.

In Japan and China, serving tea to visitors in shops and homes is an extremely important practice of social and political life. Tea is offered to every visitor as a sign of hospitality, and not offering tea would be considered impolite.

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Related Questions

Find the probability of numbers lying between 500 and 900 inclusive with exactly two consecutive figures are identical.​

Answers

Answer:

To find the probability of numbers lying between 500 and 900 inclusive with exactly two consecutive figures that are identical, we can use the following steps: Step 1: Count the total number of three-digit numbers between 500 and 900 inclusive. There are 400 three-digit numbers between 500 and 900 inclusive. Step 2: Count the number of three-digit numbers between 500 and 900 that have exactly two consecutive figures that are identical. We can break this down into cases based on the middle digit of the three-digit number. Case 1: The middle digit is not 0 or 9. In this case, there are 8 possible digits that can be used for the middle digit (i.e., 1, 2, 3, 4, 5, 6, 7, or 8). For each possible middle digit, there are

Which function is represented by the graph?

Answers

The function which is represented by graph is y= √(-x-2) + 1. So correct option is C.

Describe Function?

In mathematics, a function is a relation between two sets of objects in which each element of the first set (called the domain) is associated with exactly one element of the second set (called the range). The domain and range can be any sets, but they are usually subsets of the real numbers.

A function is typically denoted by a name, such as f(x), and is defined by an equation or a rule that specifies how the function operates on its inputs. The inputs to the function are typically denoted by x, and the outputs are denoted by f(x).

Functions can be represented graphically as well. The graph of a function is a visual representation of the relation between the input and output values. It is a plot of the input values on the x-axis and the output values on the y-axis.

Functions can be classified in various ways, such as linear, quadratic, exponential, trigonometric, etc. The behavior of a function can also be analyzed by looking at its domain and range, its symmetry, its intercepts, and its slope.

The function which is represented by graph is y= √(-x-2) + 1. So correct option is C.

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You want to create a portfolio equally as risky as the market, and you have $1,000,000 to invest. Given this information, fill in the rest of the following table: (Do not round intermediate calculations and round your answers to the nearest whole number, e.g., 32.)

Answers

The portfolio should be invested as follows:

Stock A: $120,000 (12%)

Stock B: $220,000 (22%)

Stock C: $342,857 (34%)

Risk-free asset: $319,149 (32%)

What is statistics?

Statistics is a branch of mathematics that deals with the collection, analysis, interpretation, presentation, and organization of numerical data.

To create a portfolio equally as risky as the market, we need to calculate the portfolio's beta, which is the weighted average of the betas of the individual assets in the portfolio.

The beta of the market is 1, so we need to find the weights of each asset in the portfolio that will result in a beta of 1.

Let wA, wB, and wC be the weights of stocks A, B, and C in the portfolio, respectively. Since we want the portfolio to be equally as risky as the market, we have the following equation:

wA * 1.00 + wB * 1.20 + wC * 1.40 = 1.00

We also know that the total investment is $1,000,000, so we have:

wA * $120,000 + wB * $220,000 + wC * X + (1 - wA - wB - wC) * Y = $1,000,000

where X is the investment in stock C, and Y is the investment in the risk-free asset.

We have two equations and two unknowns, so we can solve for wC and Y:

wC = (1.00 - wA * 1.00 - wB * 1.20) / 1.40

$1,000,000 = wA * $120,000 + wB * $220,000 + wC * X + (1 - wA - wB - wC) * Y

Substituting the first equation into the second equation, we get:

$1,000,000 = wA * $120,000 + wB * $220,000 + [(1.00 - wA * 1.00 - wB * 1.20) / 1.40] * X + [1 - wA - wB - (1.00 - wA * 1.00 - wB * 1.20) / 1.40] * Y

Simplifying and solving for Y, we get:

Y = $319,149

Substituting this value back into the second equation and solving for X, we get:

X = $342,857

Therefore, the portfolio should be invested as follows:

Stock A: $120,000 (12%)

Stock B: $220,000 (22%)

Stock C: $342,857 (34%)

Risk-free asset: $319,149 (32%)

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Need help with question #3

Answers

On solving the provided question we can say that As a result, the matrix following provides a foundation for V': { [1, 1, 0] }

what is matrix ?

A matrix is a collection of numbers that are organised in rows and columns. Learns about matrix elements and dimensions and introduces them for the first time. A matrix is a rectangular grid of numbers in rows and columns. Matrix A, for example, has two rows and three columns. Its name is derived from its single row and 1 n row matrix order. For example, A = [1 2 4 5] is a row matrix of order 1 by 4. Another example of a row matrix is P = [-4 -21 -17] of order 1-by-cubic.

To identify a basis for the R3 subspace V' spanned by the vector v = [1, 1, 0], we must first determine a set of linearly independent vectors that span V'.

One option is to row-reduce the augmented matrix [v|0] using the Gaussian elimination method, where 0 is the zero vector in R3.

[1 1 0 | 0]

[1 1 0 | 0]

[0 0 0 | 0]

This demonstrates that the vector v = [1, 1, 0] spans an R3 one-dimensional subspace, implying that any nonzero scalar multiple of v is also in V'.

As a result, a basis for V' is the set v, which consists solely of the vector v itself.

As a result, the following provides a foundation for V':

{ [1, 1, 0] }

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a friend has a 84% average before the final exam for a course. That score includes everything but the final, which counts for 30% of the course grade. What is the best course grade your friend can earn?

Answers

Answer:

To determine the best course grade your friend can earn, we need to know how much the final exam is worth. Since the final counts for 30% of the course grade, the remaining 70% must be from the other work completed so far. Let's assume that there's only one final exam and that it's graded out of 100 points. If your friend's current average is 84%, then they have earned 84 points out of every 100 possible points so far. To find the best course grade your friend can earn, we can set up the following equation: 0.7(84) + 0.3(F) = G where F is the score your friend earns on the final exam, and G is the overall course grade. We can solve for G by plugging in F and simplifying the equation: 0.7(

i need help with this question

Answers

Answer:(2I3O-9247)

Step-by-step explanation:

can somebody please do this with proof?​

Answers

The quadrilateral ANDC is not cyclic because the four vertices of a quadrilateral ANDC do not lie on the circumference of the circle

Proving that ANDC is a cyclic quadrilateral

A cyclic quadrilateral is a four-sided polygon where all four vertices of the quadrilateral lie on a common circle.

The circle is called the circumcircle, and it passes through all four vertices of the quadrilateral.

From the figure, we can see that only two vertices of ANDC lie on the circle

The other two are in the circle

Hence, the quadrilateral ANDC is not cyclic

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1. There are 40 apples packed into boxes. If there are 8 apples in each box, how many boxes are there?

Answers

Answer:

5 boxes

Step-by-step explanation:

We Know

There are 40 apples packed into boxes.

There are 8 apples in each box

How many boxes are there?

We take

40 / 8 = 5 boxes

So, there are 5 boxes.

The assets and liabilities of a doctor are listed below.
Home Value $589,674
Mortgage $99,408
Credit Card Balance $8,057
Owned Work Equipment $51,797
Car Value $61,182
Investments $59,090
Personal Loan $76,348


What is the total value of the doctor's capital assets?
A) $51,797
B) $61,182
C) $589,674
D) $702,653

Answers

As a result, none of the suggested solutions are the correct one. The doctor's total capital assets $761,743.

What are assets?

Assets are resources that belong to a person or a business, have value, and can be utilized to make money. Cash, investments, real estate, equipment, and inventory are a few examples of assets.

Assets are split into two groups in accounting: current assets and non-current assets. In contrast to non-current assets, which cannot be turned into cash in a year or less, current assets can be changed into cash in a year or less.

The capital assets of the doctor are:

- $589,674 for the home

- Work equipment owned: $51,797

- Vehicle Cost: $61,182

$59,090 was invested.

The value of all the capital assets owned by the doctor is:

$589,674 + $51,797 + $61,182 + $59,090

value of all the capital assets  = **$761,743

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The equation d = m/v can be used to calculate the density, d, of an object with mass, m, and volume, V. Which is an
equivalent equation solved for V?
Odm = V
Od/m = V
Om/d = V
Om-d=V

Answers

Therefore, an equivalent equation solved for V is:

V = m/d.

None of the options given in the question are equivalent to this equation.

What do you mean by the volume?

In general, "volume" refers to the amount of space occupied by a three-dimensional object or substance. It can also refer to the amount or quantity of something, such as the volume of water in a swimming pool, the volume of air in a room, or the volume of a book.

In the context of mathematics, the term "volume" is often used to refer specifically to the measure of the amount of space enclosed by a solid object, typically measured in cubic units such as cubic meters (m³) or cubic feet (ft³). For example, the volume of a cube with sides of length 1 meter would be 1 cubic meter (1 m³).

To solve for V in terms of the given equation, we need to isolate V on one side of the equation.

Starting with d = m/V, we can rearrange the terms as follows:

[tex]d = m/V[/tex]

Multiplying both sides by V, we get:

[tex]dV = m[/tex]

Dividing both sides by d, we get:

[tex]V = m/d[/tex]

Therefore, an equivalent equation solved for V is:

[tex]V = m/d.[/tex]

None of the options given in the question are equivalent to this equation.

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One clay brick weighs 5.03 pounds. The brick is 1 inch long and 2 1/4 inches wide. If the clay weighs 0.07 pounds per cubic inch, what is the volume of the brick? Round your answer to the nearest integer.

Answers

The volume of the clay brick is 2.25 cubic inches and the weight of the clay brick is 0.1575 pounds

The volume of the clay brick, we need to use the dimensions provided. The length of the brick is 1 inch and the width is 2 [tex]\frac{1}{4}[/tex] inches. We can assume the height of the brick is also 1 inch since it is not specified.

The formula for the volume of a rectangular object is

V = lwh

where V is the volume, l is the length, w is the width, and h is the height.

Using the given dimensions, we can calculate the volume of the brick:

V = (1 inch) x (2 [tex]\frac{1}{4}[/tex] inches) x (1 inch)

V = (1 inch) x (2.25 inches) x (1 inch)

V = 2.25 cubic inches

V = 2.25 inches³

Since the density of the clay is given as 0.07 pounds per cubic inch, we can find the weight of the brick using the formula:

Weight = Volume x Density

Weight = 2.25 inches³ x 0.07 pounds/inches³

Weight = 0.1575 pounds

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Assuming that the confidence coefficient is 90%, then choose from the following concerning the z-value or t-value that would be used in the interval.

Answers

Thus, an interval with such a 90% confidence level has a z-score of 1.645.

Explain about the confidence interval/coefficient:

An interval estimate of the mean is what the confidence limits for mean are. Since the estimation of the mean differs from sample to sample, interval estimates are frequently preferred.

A confidence interval produces a lower and upper limit for such mean rather than a single estimate of the mean. The interval estimate provides a clue as to the degree of uncertainty in our estimation of the true mean. Our estimate is more precise the narrower the interval.A confidence coefficient is used to express confidence boundaries. Although it is somewhat arbitrary to choose a confidence coefficient, 90%, 95%, and 99% intervals are frequently used in practise, with 95% being the most popular.

From the positive z score table:

As 0.90 falls perfectly between the 1.64 and 1.65 z-scores, I shall calculate the z-score as 1.645.

Thus, an interval with such a 90% confidence level has a z-score of 1.645.

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Complete question:

Assuming that the confidence coefficient is 90%, then Find the the z-value that would be used in the interval.

4x + 14 + 4x = 38+77-1

Answers

Answer:

x=25/2 or 12.5

Step-by-step explanation:

8x=115-15

8x=100

x=100/8

x=25/2 or 12.5

Answer:

x = 12.5

Step-by-step explanation:

4x + 14 + 4x = 38+77 - 1

8x + 14 = 38 + 77 - 1

8x + 14 = 114

8x = 100

x = 12.5

the ratio of pickups to cars sold at a dealership is 2 to 3. If the dealership sold 142 more cars than pickups in 1999, then how many of each did it sell

Answers

The number of pickups is 284.

and the number of cars is 142 more than that = 426.

What is arithmetic?

Arithmetic is an elementary part of mathematics that consists of the study of the properties of the traditional operations on numbers—addition, subtraction, multiplication, division, exponentiation, and extraction of roots.

Here, we have

Given: The ratio of pickups to cars sold at a dealership is 2 to 3. If the dealership sold 142 more cars than pickups in 1999

Let y = the number of cars.

x/y = 2/3.

The dealership sold 142 more cars than pickups.

We get y = x + 142

In the equation of x/y = 2/3, replace y with x + 142 to get:

x/(x+142) = 2/3

cross multiply to get:

3x = 2*(x+142)

simplify to get:

3x = 2x + 284

subtract 2x from both sides of the equation to get:

x = 284.

Hence,  the number of pickups is 284.

and the number of cars is 142 more than that = 426.

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I poll is given showing 60% are in favor of a new building project if 10 people or chosen at random what is the probability that exactly 7 of them favor the new building project?

Answers

The probability that exactly 7 out of 10 people chosen at random favor the new building project is approximately 0.2010 or 20.10%.

To calculate the probability that exactly 7 out of 10 people chosen at random favor the new building project, we need to use the binomial probability formula, which is:

P(X = k) = [tex](n choose k) * p^k * (1-p)^(n-k)[/tex]

where:

n = 10 (the number of trials)

k = 7 (the number of successes we want to find)

p = 0.6 (the probability of success)

Using this formula, we can calculate the probability as:

P(X = 7) = (10 choose 7) * [tex]0.6^7 * (1-0.6)^(10-7)[/tex]

P(X = 7) = (10!/7!3!) * [tex]0.6^7 * 0.4^3[/tex]

P(X = 7) = 120 * 0.0279936 * 0.064

P(X = 7) = 0.2010 (rounded to four decimal places)

Therefore, around 0.2010 or 20.10% of people like the new building project, which is the probability that exactly 7 out of 10 randomly selected individuals will do so.

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Solve the systems by substitution.
y = -x - 32
y = 5x

Answers

We can solve this system of equations by substitution. Since both equations are solved for y, we can set them equal to each other and solve for x.

y = -x - 32 ...(1)

y = 5x ...........(2)

Substituting (1) into (2), we get:

-x - 32 = 5x

Simplifying and solving for x, we have:

6x = -32

x = -32/6

x = -16/3

Now that we know x, we can substitute it back into either equation to solve for y. Let's use equation (2):

y = 5x

y = 5(-16/3)

y = -80/3

Therefore, the solution to the system of equations is (x, y) = (-16/3, -80/3).

f(x)=-x+ 2
g(x)=-4x²+x+5
Find (fog)(x)

Show work on how you found answer and then answer

Answers

The function (fog)(x) is 4x² - x - 3.

Define function  

In mathematics, a function is a rule that maps each element from a set (called the domain) to a unique element in another set (called the range or codomain).

In other words, a function is a mathematical object that takes one or more inputs, performs a specified operation on them, and produces an output. The input values of a function are called its arguments, and the output value is called the function value.

Starting with g(x):

g(x) = -4x² + x + 5

Now substituting g(x) into f(x):

f(g(x)) = -(g(x)) + 2

= -[-4x² + x + 5] + 2 (substituting g(x) into f(x))

= 4x² - x - 3

Therefore, (fog)(x) = 4x² - x - 3.

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(9, 23) is a point on the graph y = f(x)
Which point must be on the graph of y = f(x) + 4 ?
A (9, 19) B (13, 23) C (5, 23)
D (9, 27)

Answers

Answer:Option (d)

Step-by-step explanation: D (9, 27)

1 Write the recursive formula for the following. Do not include spaces in your answer. 13, 15, 17, 19...​

Answers

Answer:

add 2 or find following odd number

Step-by-step explanation:

+2 moves 13 to 15, 15 to 17, 17 to 19, ...

How long did it take to pay of the loan? What is the answer?

Answers

The time it would take to pay back the loan is 16 years.

How long would it take to pay back the loan?

When a loan earns a simple interest, it means that the interest that would be paid by the borrower grows as a linear function of the amount borrowed, interest rate and the duration of the loan.

Simple interest = loan amount x time x interest rate

Interest = amount repaid - loan value

$678,400 - $320,000 = $358,400

Duration of the loan = simple interest / (loan amount x interest rate)

$358,400 / (0.07 x 320,000) = 16 years

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Margo borrows $200, agreeing to pay it back with 8% annual interest after 16 months. How much interest will she pay?

Answers

Margo will pay $21.28 in interest for the loan. The formula I = Prt is used to calculate the interest for a loan.

What is interest rate?

It is expressed as a percentage of the total amount borrowed and is typically noted as an annual percentage rate (APR).

The interest that Margo will pay can be calculated by using the formula I = Prt, where I is the interest, P is the principal (the initial amount borrowed), r is the interest rate, and t is the length of time.

In this case, the principal is $200, the interest rate is 8%, and the time is 16 months.

Therefore, the interest that Margo will pay is

I = 200 x 8% x (16/12)

 = $21.28

Therefore, Margo will pay $21.28 in interest for the loan.

The formula I = Prt is used to calculate the interest for a loan.

Here, I is the interest, P is the principal (the initial amount borrowed), r is the interest rate, and t is the length of time.

This formula can be used to calculate interest for any loan, no matter the principal, interest rate, or length of time.

By simply substituting the values into the formula, the interest can be easily calculated.

Therefore, in this case, Margo will pay $21.28 in interest for the loan.

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(1/6)30x+(1/6)24-(1/7)63-(1/7)7x

Answers

Answer: 15 IF X=5 // OR its 4x-5 IF youre looking for an equivalent answer

Helpppppppppppppppppp

Answers

The answers are A, C, E, and F.

A proportion often shows the relationship between:

Answers

Answer: two related quantities by comparing their ratios and establishing equivalence.

Step-by-step explanation: A proportion is a mathematical statement that equates two ratios.  It is commonly used to express the relationship between two related quantities or sets of data.  A proportion consists of four values: two ratios, where each ratio is made up of a numerator and a denominator.

Proportions are useful for comparing and understanding the relationship between different quantities.  They can be used to solve various real-life problems, such as determining equivalent values, finding unknown quantities, or making predictions based on known information.

For example, if a recipe calls for 2 cups of flour and 1 cup of water, the proportion would be 2:1. This proportion shows the relationship between the amount of flour and water needed in the recipe.

In a proportion, the ratios are equivalent, meaning they have the same value.  This equality allows us to solve for unknown quantities by cross-multiplying and finding the missing value.

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Helpppppppppp

In the month of January, Sasha had a balance of 3200$ on her credit card. She made a payment of $300 and left the Remaining balance to be paid later. How much interest will she pay this month if her APR is 18.75% round to the nearest cent.

$46.19

$35.10

$4.50

$543.75

Answers

Answer:

543.75

Step-by-step explanation:

A Large group is throwing a party. There are enough people attending to fill 8 tables, each with 5 seats. Each person will be served 3 glasses of leomonade. How many cups of leomonade will be served at the party

Answers

Answer:

120 cups of lemonade

Step-by-step explanation:

1. Multiply 8 x 5 which will give you 40

2. Multiply 40 x 3 which equals 120

4. San Antonio, Texas, depends on the Edwards Aquifer for its water supply. The graph shows the
decline of the water level of the aquifer over a two-week period beginning on May 20, 2012.
Aquifer Level (ft)
664
663
662
661
660
659
658
657
656
655
654
653
652
0
7
Water Level of
Edwards Aquifer
A -1.6
B. -0.8
C. 0.625
D. 1.25
8 10 12 14
Days since May 20th
Based on the graph, which of the following is the best estimate of the change in the water level.
in feet per day, during this time period?

Answers

Answer:

d=9

Step-by-step explanation:

9x1

Two-thirds of the earth is covered by water and remaining is covered by land. Find the percentage of land and water in the earth.​

Answers

Answer:

About 71 percent of the Earth's surface is water-covered

and the rest of the percent is 29 percent

Step-by-step explanation:

Area of land: 148 326 000 km2 (57 268 900 square miles), this are 29% of the total surface of Planet Earth. Area of water: 361 740 000 km2 (139 668 500 square miles), this are 71% of the total surface of the Earth.

Step-by-step explanation & Answer

We know that

[tex]\frac{2}{3}[/tex] = Water covering earth

[tex]\frac{1}{3}[/tex] = Land covering earth

We know that there is more water than land.

We would need to find the percentage which is:

[tex]\frac{2}{3}[/tex] = ?%

?% = 66.6666667% Or roughly 67%

[tex]\frac{1}{3}[/tex] = ?%

?% = 33.33 or 33%

We can see 67% & 33% = 100%!

So the answer to you problem is,

Water covering earth: 67%

Land covering earth: 33%

What was the age distribution of prehistoric Native Americans? Suppose an extensive anthropological studies in the southwestern United States gave the following information about a prehistoric extended family group of 84 members on what is now a Native American reservation.
Age range (years) 1-10 11-20 21-30 31 and over
Number of individuals 35 22 20 7
For this community, estimate the mean age expressed in years, the sample variance, and the sample standard deviation. For the class 31 and over, use 35.5 as the class midpoint. (Round your answers to one decimal place.)
x =
years
s2 =
s =
years

Answers

The estimated mean age, sample variance, and sample standard deviation for a prehistoric extended family group of 84 members in the southwestern United States are 14.5 years, 83.5 square years, and 9.1 years, respectively.

To estimate the mean age, we need to calculate the weighted average of each age group's midpoint using their respective frequencies.

The midpoint of the first class (1-10 years) is 5.5, the midpoint of the second class (11-20 years) is 15.5, the midpoint of the third class (21-30 years) is 25.5, and the midpoint of the fourth class (31 and over) is 35.5.

To calculate the weighted average, we multiply each midpoint by its respective frequency, sum these products, and divide by the total number of individuals:

x = [tex]\frac{5.5 x 35 + 15.5 x 22 + 25.5 x 20 + 35.5 x 7}{84}[/tex] = 14.5 years

Therefore, the estimated mean age for this community is 14.5 years.

To calculate the sample variance and sample standard deviation, we first need to calculate the deviation of each observation from the mean. Then, we square each deviation, sum these squared deviations, and divide by n - 1 to get the sample variance.

Using the formula:

s2 = [tex]\frac{\sum_{i=1}^{n}(x_i - \bar{x})^2}{n-1}[/tex]

sample variance as follows:

s2 = [tex]\frac{[(1-10-14.5)^2 \times 35 + (11-20-14.5)^2 \times 22 + (21-30-14.5)^2 \times 20 + (35.5-14.5)^2 \times 7]}{83}[/tex] = 83.5

Therefore, the estimated sample variance for this community is 83.5 square years.

Using the formula:

s = [tex]\sqrt{s2}[/tex]

The sample standard deviation can be calculated as follows:

s = [tex]\sqrt{83.5}[/tex] = 9.1 years

Therefore, the estimated sample standard deviation for this community is 9.1 years.

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For a fixed location, the number of sunlight hours in a day fluctuates throughout the year. Suppose that the number of daily sunlight hours in a particular location can be modeled by the following.

Answers

Using trigonometric equation, we can find that on January 25th, 218 days after June 21st, there will be 11 hours of sunlight.

Define trigonometric equation?

The trigonometric equations can be linear, quadratic, or polynomial equations and are conceptually related to algebraic equations. Trigonometric equations substitute the Sin, Cos, and Tan trigonometric ratios for the variables found in a typical polynomial equation. Sinθ, Cosθ, or Tanθ are the trigonometric ratios that are employed in trigonometric equations.

The number of daily sunlight hours of a particular location is modelled by the trigonometric equation,

l(t) = 12 + 3.5sin (2/365t)

L(t) denotes the number of hours of sunlight in a day.

t is the number of days after June 21st.

In order to find the day during the first 365 where there are 11 hours of sunlight, we must know the value of "t" for which L(t) = 11 hours. The result of solving for t in the given equation with L(t)=10 is as follows:

l(t) = 12 + 3.5sin (2/365t)

11 = 12 + 3.5sin (2/365t)

11-12 = 3.5sin (2/365t)

-1 = 3.5sin (2/365t)

-1/3.5 = sin (2/365t)

-0.285 = sin (2/365t)

For the inverse function of y = sin x

sin ⁻¹(y) =x + 2n

Given that we must determine the day with 11 hours of sunlight in the first 365 days, we get the following results when we set n=0: t = -35.3521 or t =217.9422.

Now, t cannot be negative since we want to discover that the day after June 21st will have 10 hours of sunlight. therefore, ignoring t=-35.3521. We now have t=217.9422.

By rounding, we arrive at the necessary response, t=218.

So, it will have 11 sunlights on January 25th—218 days after June 21st.

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