The estimated volume of the snowpack in the park is approximately 1.94 billion cubic meters.
To estimate the volume of the snowpack in the park, we need to calculate a double integral of the function d(x, y) over the domain D:
V = ∬_D d(x, y) dA
We can evaluate this integral by using iterated integrals. First, we integrate with respect to x over the interval [0, 30] (since the line y = 180 - 2x intersects the x-axis at x = 90):
V = ∫_0^30 (∫_0^(180-2x) (-0.024x + 0.012y + 1.2) dy) dx
Simplifying the inner integral:
V = ∫_0^30 [-0.024xy + 0.006y^2 + 1.2y]_0^(180-2x) dx
V = ∫_0^30 (-0.432x^2 + 21.6x - 5832) dx
Simplifying the integral:
V = [-0.144x^3 + 10.8x^2 - 5832x]_0^30
V = -0.144(30)^3 + 10.8(30)^2 - 5832(30)
V = 1.942592 billion cubic meters (rounded to nine decimal places)
Therefore, the estimated volume of the snowpack in the park is approximately 1.94 billion cubic meters.
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the radius of the area of a cylinder is 36m and it’s height is 46m. find the surface area of the cylinder in terms of
Surface area of the cylinder in terms of [tex]$\pi$[/tex] is [tex]$5904\pi m^2$[/tex].
How to find the surface area of the cylinder?The surface area of a cylinder can be calculated by adding the area of the two bases (which are circles) and the lateral area (which is the area of the curved surface).
The radius of the cylinder is given as 36m and the height as 46m. Therefore, the diameter of the cylinder is 72m (twice the radius). Using the formula for the area of a circle, we can calculate the area of each base:
[tex]$A_{base} = \pi r^2 = \pi (36m)^2 = 1296\pi m^2$[/tex]
The lateral area of the cylinder can be calculated using the formula:
[tex]$A_{lateral} = 2\pi r h$[/tex]
Substituting the given values, we get:
[tex]$A_{lateral} = 2\pi (36m) (46m) = 3312\pi m^2$[/tex]
Therefore, the total surface area of the cylinder is:
[tex]$A_{total} = A_{base} + A_{lateral} + A_{base} = 2A_{base} + A_{lateral}$[/tex]
Substituting the values we calculated, we get:
[tex]$A_{total} = 2(1296\pi m^2) + 3312\pi m^2 = 5904\pi m^2$[/tex]
So the surface area of the cylinder in terms of [tex]$\pi$[/tex] is [tex]$5904\pi m^2$[/tex].
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Need help, i have the answer just need the steps
(8^2/7)(8^1/4)
Answer:
Step-by-step explanation:
we can use the laws of exponents, which state that when multiplying terms with the same base, we add their exponents. In this case,both terms have a base of 8, so we can add their exponents of 2/7 and 1/4.
First, let's write 8 as a power of 2: 8 = 2^3. Then we can rewrite the original expression as (2^3)^(2/7) * (2^3)^(1/4). Using the power of a power rule, we can simplify this to 2^(3 * 2/7) * 2^(3 * 1/4).
Next, we can simplify the exponents by finding a common denominator. The smallest common multiple of 7 and 4 is 28, so we can rewrite the exponents as 6/28 and 21/28, respectively. Thus, we have 2^(3 * 6/28) * 2^(3 * 21/28).
Now we can simplify the exponents by multiplying the bases and exponents separately: 2^(18/28) * 2^(63/28). We can simplify the fractions by dividing both the numerator and denominator by 2, giving us 2^(9/14) * 2^(63/28).
Finally, we can add the exponents since we are multiplying terms with the same base: 2^(9/14 + 63/28). We can simplify the exponent by finding a common denominator of 28,
giving us 2^(36/28 + 63/28) = 2^(99/28). This is our final answer, which is an irrational number that is approximately equal to 69.887.
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a circular pool has a radius of 32 cm find its area?
Find the radius of the cylinder. Round to the nearest whole centimeter.
The cylinder has a height of 6 centimeters and a radius of r1. The volume of the cylinder is 302 cubic centimeters.
___ centimeters
Answer:
To find the radius of the cylinder, we can use the formula for the volume of a cylinder, which is pi*(r1^2)*h, where r1 is the radius and h is the height. Given that the cylinder has a height of 6 centimeters and a volume of 302 cubic centimeters, we can solve for r1 by dividing the volume by pi times the height, and then taking the square root of the result. After rounding to the nearest whole centimeter, the radius of the cylinder is approximately 5 centimeters.
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Help asap please!!!!
Ella rolls a die and then flips a coin. The sample space for this compound event is represented in the table (His heads and Tis talls). Complete the table and the sentence beneath it. Die 1 2 3 4 5 6 heads H-1 H-2 H-3 H-5 H-6 Coin tails T-1 T-3 T-4 T-5 The size of the sample space is
The sample space for Ella's compound event where she rolls a die and then flips a coin can be represented in the table below:
Die: 1 2 3 4 5 6
Coin: H-1 H-2 H-3 H-5 H-6 T-1 T-3 T-4 T-5
The size of the sample space is the total number of possible outcomes, which in this case is the number of rows in the table. We can see that there are 9 rows in the table, so the size of the sample space is 9.
To understand the sample space, we can imagine that each row in the table represents a possible outcome of the compound event. For example, the first row represents the outcome where Ella rolls a 1 on the die and gets heads on the coin. The second row represents the outcome where Ella rolls a 2 on the die and also gets heads on the coin, and so on.
Understanding the sample space is important in probability theory because it allows us to calculate the probability of specific events occurring. By knowing the size of the sample space and the number of favorable outcomes, we can determine the probability of an event happening.
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Marshall is renting a bike for the day. It costs $13 for up to one hour. After one hour, the price increases to $20. After three hours, the price increases again to $50. The maximum time he can rent the bike is 10 hours total
The piecewise function that represents the situation is therefore:
Costs Possible hours
13 0 < x ≤ 1
20 1 < x ≤ 3
50 3 < x ≤ 10
How to find the piecewise function ?We see that up to one hour, the cost to Marshall would be $ 13 so the possible hours at that price is 0 < x ≤ 1 .
Likewise from one hour, the price goes up to $ 20 which means that possible hours become 1 < x ≤ 3 because the price will increase at 3 hours again.
From 3 hours, the price becomes $ 50 and there are a maximum of 10 hours so the hours become 3 < x ≤ 10 .
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Can someone help me I'm stuck.
Alexandria rolled a number cube 60 times and recorded her results in the table.
What is the theoretical probability of rolling a one or two? Leave as a fraction in simplest from
The theoretical probability of rolling a one or two is 3/5 or 0.6 as a decimal.
The theoretical probability of an event happening is the number of favorable outcomes divided by the total number of possible outcomes.
In this case, Alexandria rolled the number cube 60 times and recorded her results in the table.
Looking at the table, we can see that the number 1 came up 16 times and the number 2 came up 20 times.
So the number of favorable outcomes is 16 + 20 = 36.
And the total number of possible outcomes is 60.
Therefore, the theoretical probability of rolling a one or two is:
P(1 or 2) = favorable outcomes/total outcomes = 36/60
Simplifying the fraction, we get:
P(1 or 2) = 3/5
So the theoretical probability of rolling a one or two is 3/5 or 0.6 as a decimal.
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11
Differentiate the function and find the slope of the tangent line at the given value of the independent variable s=8-41², 1=-3 s'(t)=0 The slope of the tangent line is at t= -3.
The slope of the tangent line to the function [tex]s(t) = 8 - 41t^2[/tex] at t = -3 is 246.
Process of finding slope:1. Differentiate the function s(t) with respect to the independent variable t: [tex]s(t) = 8 - 41t^2[/tex].
2. Calculate the derivative s'(t).
3. Evaluate the derivative at the given value of t.
Step 1: Differentiate the function [tex]s(t) = 8 - 41t^2[/tex].
To differentiate this function, we apply the power rule for differentiation.
The derivative of a constant (8) is 0, and the derivative of 41t^2 is -82t
(since we multiply the exponent 2 by the coefficient 41 and then subtract 1 from the exponent).
Step 2: Calculate the derivative s'(t).
s'(t) = 0 - 82t
Step 3: Evaluate the derivative at the given value of t (t = -3).
s'(-3) = -82(-3) = 246
The slope of the tangent line to the function [tex]s(t) = 8 - 41t^2[/tex] at t = -3 is 246.
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A dth tv connection provides channels in english and other languages in the ratio 7:13. what percentage of the channels are in english
A DTH TV connection provides channels in English and other languages in the ratio 7:13. To find out what percentage of the channels are in English, you need to divide the number of English channels by the total number of channels and then multiply the result by 100.
Let's assume that there are a total of 100 channels available on this DTH TV connection. According to the given ratio, 7 out of every 20 channels will be in English. So, the percentage of channels in English will be:
(7/20) x 100 = 35%
Therefore, 35% of the channels on this DTH TV connection are in English.
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Which best describes the scale factor for each dilation?
Dilation 1 has a scale factor
.
Dilation 2 has a scale factor
.
Dilation 3 has a scale factor
.
The statement "Dilation 2 has a scale factor 2" (option b).
Dilation is a transformation that changes the size of an object but not its shape. It is a type of transformation that enlarges or reduces an object by a certain factor called the scale factor. The scale factor is a ratio of the size of the dilated image to the size of the original image.
Now, let's talk about the scale factor for each dilation you asked about.
For dilation 1, the scale factor is 1. This means that the size of the dilated image is the same as the size of the original image. In other words, there is no change in size. This type of dilation is often referred to as the identity transformation because it doesn't change the shape or size of the original object.
For dilation 2, the scale factor is 2. This means that the size of the dilated image is twice as large as the size of the original image. In mathematical terms, if the original object has a length of 'x', then the length of the dilated image will be '2x'. Similarly, if the original object has a width of 'y', then the width of the dilated image will be '2y'.
For dilation 3, the scale factor is 3. This means that the size of the dilated image is three times as large as the size of the original image. In mathematical terms, if the original object has a length of 'x', then the length of the dilated image will be '3x'. Similarly, if the original object has a width of 'y', then the width of the dilated image will be '3y'.
Hence the correct option is (b).
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Answer:
Dilation 1 has a scale factor between 0 and 1
Dilation 2 has a scale factor greater than 1
Dilation 3 has a scale factor equal to 1
Step-by-step explanation:
Joshua's mail truck travels 14 miles every day he works
and is not used at all on days he does not work. At the
end of his 100th day of work the mail truck shows a
mileage of 76,762. Model Joshua's truck mileage as a
function of the number of days he has worked. When
will he reach 100,000 miles?
Solving the equation, Joshua will reach 100,000 miles after approximately 1,760 days of work.
To model Joshua's truck mileage as a function of the number of days he has worked, we can use the following equation:
Mileage (M) = 14 * Number of days worked (D) + Initial Mileage (I)
First, we need to determine the initial mileage on the mail truck. To do this, we can use the information given for his 100th day of work:
76,762 = 14 * 100 + Initial Mileage
76,762 = 1,400 + Initial Mileage
Initial Mileage (I) = 76,762 - 1,400
Initial Mileage (I) = 75,362
Now we can rewrite the equation as:
Mileage (M) = 14 * Number of days worked (D) + 75,362
To find when Joshua will reach 100,000 miles, we can set M equal to 100,000 and solve for D:
100,000 = 14 * D + 75,362
24,638 = 14 * D
D ≈ 24,638 / 14
D ≈ 1,759.857
Since Joshua cannot work a fraction of a day, he will reach 100,000 miles after approximately 1,760 days of work.
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FRACTIONS It is John's birthday and his mother decided to give him a birthday party. She bought him three cakes for his party; cake one was sliced into 8 pieces, cake two was sliced into 10 pieces, and cake three was sliced into 12 pieces. If the guests at the party ate 4 slices of cake one, 7 slices of cake two and 5 slices of cake three; calculate the amount of cake that was eaten in total.
There are 30 slices in total, so our denominator would be 30.
Now we simply have to add 4, 7 and 5. The answer to this would be 16.
So the amount of cake eaten in total is 16/30.
If your assignment is for improper fractions, I'm guessing the answer would be 16/3 instead.
Answer:
1 37/60 cakes
Step-by-step explanation:
You want the total cake eaten if 4 of 8 slices, 7 of 10 slices, and 5 of 12 slices were eaten.
SumThe sum of the three fractions is ...
4/8 +7/10 +5/12
= 5/10 +7/10 +5/12 . . . . . . . 4/8 = 1/2 = 5/10
= 12/10 +5/12
= 6/5 +5/12
= (6·12 +5·5)/(5·12) = 97/60 = 1 37/60
The total amount of cake that was eaten was equivalent to 1 37/60 cakes.
__
Additional comment
Your calculator can relieve the tedium of this calculation.
Solve the given differential equation 3 4ydx - 4xdy + x³dx = 7dx The solution is= (Type an equation.)
The solution of the given differential equation is y = x + Cx⁴ - x²/4, where C is a constant.
We begin by rearranging the terms as follows:
(4y + x³ - 7)dx = (4x)dy
Integrating both sides, we get:
4xy + (1/4)x⁴ - 7x = 2y² + C
where C is the constant of integration.
Next, we can rearrange this equation to solve for y:
y² = 2xy + (1/8)x⁴ - (7/2)x - C/2
y² - 2xy = (1/8)x⁴ - (7/2)x - C/2
We can complete the square to obtain a more useful expression:
(y - x)² = (1/8)x⁴ - (7/2)x - C/2 + x²
y - x = ±sqrt((1/8)x⁴ - (7/2)x - C/2 + x²)
Simplifying this expression, we get:
y = x ±sqrt(Cx⁴ - (1/4)x⁴ + 7x - C)
Taking the positive sign for simplicity, we get the final solution as:
y = x + sqrt(Cx⁴ - (1/4)x⁴ + 7x - C)
where C is the constant of integration.
We can also simplify this solution further by using the identity (a + b)² = a² + 2ab + b² to get:
y = x + Cx⁴ - x²/4
where C is a constant, as desired.
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Rewrite in standard form.
y
=
3
(
x
−
5
)
2
−
1
The equation y = 3(x - 5)^2 - 1 written in the standard form is y = 3x^2 - 30x + 74
Rewriting the equation in standard formTo rewrite the given equation in standard form, we need to expand and simplify the squared term:
y = 3(x - 5)^2 - 1 [given equation]
y = 3(x^2 - 10x + 25) - 1 [expand (x - 5)^2 using FOIL method]
y = 3x^2 - 30x + 74 [combine like terms]
Therefore, the standard form of the equation is:
y = 3x^2 - 30x + 74
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Will a geometric sequence always grow faster than an arithmetic one?
A geometric sequence is a type of sequence where each term is found by multiplying the previous term by a constant factor. This means that each term is a multiple of the one before it. In contrast, an arithmetic sequence is a type of sequence where each term is found by adding a constant value to the previous term.
This means that each term is a sum of the one before it and a fixed value.
To answer your question, whether a geometric sequence will always grow faster than an arithmetic one depends on the values of the constant factor and fixed value in each sequence. In general, if the constant factor in a geometric sequence is greater than 1, the terms will grow at an increasingly faster rate than in an arithmetic sequence.
However, if the constant factor is between 0 and 1, the terms will grow at a decreasing rate, meaning that the sequence will actually grow more slowly than an arithmetic one.
It's important to note that the rate of growth is not the only factor to consider when comparing geometric and arithmetic sequences. The actual values of the terms in each sequence can also differ significantly, depending on the starting term and the values of the common ratio and common difference.
In some cases, an arithmetic sequence may actually have higher values than a geometric one, even if it grows more slowly.
In summary, whether a geometric sequence will always grow faster than an arithmetic one depends on the specific values of each sequence. However, in general, if the constant factor in a geometric sequence is greater than 1, it will grow faster than an arithmetic sequence.
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A college entrance exam had a mean of 80 with a standard deviation of 12 find the actual test score that coincides with a z-score of -1.25
The actual test score that coincides with a z-score of -1.25 is 65 when A college entrance exam had a mean of 80 with a standard deviation of 12 and a z-score of -1.25.
The formula to calculate the actual test score from a z-score is given as,
X = μ + Zσ,
where:
X = the actual or raw test score
μ = the mean
Z = z-score
σ = standard deviation.
Given data:
μ = 80
Z = -1.25
σ = 12
Substuting the values of μ, Z, and σ in the formula, we get;
X = μ + Zσ,
X = 80 + (-1.25)(12)
X = 80 + (-15)
X = 65.
Therefore, the actual test score that coincides with a z-score of -1.25 is 65.
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6 cm
4.4 cm
2 cm
determine the total surface area of the figure.
The total surface area of the given cuboid is 94.4 square centimeter.
Given that, the dimensions of box are length=4.4 cm, breadth=2 cm and Hight=6 cm.
We know that, the total surface area of cuboid = 2(lb+bh+lh)
= 2(4.4×2+2×6+4.4×6)
= 2×47.2
= 94.4 square centimeter
Therefore, the total surface area of the given cuboid is 94.4 square centimeter.
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Town Hall is located 4.3 miles directly east of the middle school. The fire station is located 1.7 miles directly north of Town Hall.
What is the length of a straight line between the school and the fire station? Round to the nearest tenth.
The length of the straight line between the school and the fire station is 4.6 miles.
The length of a straight line between the school and the fire station?We can form a right-angled triangle with the school at the right-angle.
The distance between the school and the fire station is the hypotenuse of this triangle.
Using the Pythagorean theorem, we can calculate the length of the hypotenuse:
h^2 = 4.3^2 + 1.7^2
h^2 = 21.38
h ≈ 4.62
Rounding to the nearest tenth, the length of the straight line between the school and the fire station is approximately 4.6 miles.
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A social scientist is interested in determining if there is a significant difference in the proportion of republicans between two areas of town. He takes independent random samples of 200 families in each area of town and a significance test was conducted. The p-value was 0. 416. What should be our conclusions?.
The p-value of 0.416 indicates that there is no significant difference in the proportion of Republicans between the two areas of town. Therefore, we fail to reject the null hypothesis and conclude that there is no evidence of a significant difference in the proportion of Republicans between the two areas of town.
Based on the given information, the p-value is 0.416, which is larger than the conventional level of significance (e.g., 0.05 or 0.01). Therefore, we fail to reject the null hypothesis that there is no significant difference in the proportion of republicans between the two areas of town.
In other words, we cannot conclude that there is a significant difference between the two areas. It is possible that any observed difference could be due to chance.
However, it is important to note that statistical significance does not necessarily mean practical significance, and further investigation may be needed to determine if there are any meaningful differences between the two areas in terms of the proportion of republicans.
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Pls help with these two equations. Pls
Answer:
11. x = 16
12. x = 26
Step-by-step explanation:
11. ∠1 + ∠2 = 90°
∠1 = 42°
∠2 = 90° - 42° = 48°
3x = 48
x = 16
12. ∠C + ∠D = 180°
∠C = 128°
∠D = 180° - 128° = 52°
2x = 52
x = 26
Help translations and reflections
Thus, Coordinates of image of points A', B' and C' are- A'(-6, 10), B'(-2, -8), C'(4 , -7)
Explain about the reflection along the y-axis:A figure is transformed into a reflection by a transformational process. In a point, a line, or a plane, figures can be reflected. The image and preimage coincide when reflecting any symbol in a line or a point.
The x-coordinate remains constant when a point is reflected across the x-axis, but the y-coordinate is assumed to be the additive inverse. Point (x, y) is reflected across the x-axis as (x, -y).The y-coordinate stays the same when a point is reflected across the y-axis, but the x-coordinate is assumed to be the additive inverse. Point (x, y) is reflected across the y-axis as (-x, y).Given coordinates of points A, B and C
A(6, 10), B(2, -8), C(-4 , -7)
After reflection (x, y) ---> (-x, y).
Thus, Coordinates of image of points A', B' and C' are-
A'(-6, 10), B'(-2, -8), C'(4 , -7)
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When the price of a certain product is $40, 25 items can be sold. When the price of the same
product costs $20, 185 items can be sold. On the other hand, when the price of this product
is $40, 200 items will be produced. But when the price of this product is $20, only 100 items
will be produced. Use this information to find supply and demand functions (assume for
simplicity that the functions are linear), and compute the consumer and producer surplus at
the equilibrium price
Based on the information, the equilibrium price is $56.67
How to calculate the equillbriumUsing the first data point, we have:
25 = a - 40b
Using the second data point, we have:
185 = a - 20b
Solving these two equations simultaneously, we get:
a = 325
b = 5/2
So the demand function is:
Qd = 325 - 5/2 P
the supply function is:
Qs = -100 + 5P
325 - 5/2 P = -100 + 5P
425 = 15/2 P
P = $56.67
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The height of a right rectangular pyramid is equal to x units. The length and width of the base are units and units. What is an algebraic expression for the volume of the pyramid?
The algebraic expression for the volume of the right rectangular pyramid is (x/3) × (units²).
The volume of a right rectangular pyramid is given by the formula;
V = (1/3) × base_area × height
where base_area is area of the base of the pyramid.
In this case, the length and width of the base are given as units and units, respectively. Therefore, the area of the base is;
base_area = length × width
Substituting the given values, we get;
base_area = units × units = units²
The height of the pyramid is given as x units. Therefore, the volume of the pyramid can be expressed as;
V = (1/3) × (units²) × x
Simplifying the expression, we get;
V = (x/3) × (units²)
Therefore, the algebraic expression for the volume of pyramid is (x/3) × (units²).
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Rate of US adults who use the internet can be modeled by dI dt -0.5t+16.9, 5
The rate of change after 5 years is 14.4%, indicating that the percentage of US adults using the internet is increasing at a rate of 14.4% per year.
Based on the provided information, the rate of US adults who use the internet can be modeled by the equation dI/dt = -0.5t + 16.9, where t represents the time in years and I represents the percentage of adults using the internet.
To determine the rate of change at a specific time, we need to substitute the value of t into the equation.
For example, to find the rate of change after 5 years, we would substitute t = 5:
dI/dt = -0.5(5) + 16.9
dI/dt = -2.5 + 16.9
dI/dt = 14.4
Therefore, the rate of change after 5 years is 14.4%, indicating that the percentage of US adults using the internet is increasing at a rate of 14.4% per year.
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A rectangle is inscribed in a circle of radius 5 centimeters. Find the perimeter of the rectangle
The perimeter of the rectangle that is inscribed in a circle of radius 5 cm is 28cm
Let x and y be the side of the rectangle
Diameter of circle = radius × 2
Diameter = 5×2
Diameter = 10
According to the Pythagorean theorem
(Diameter)² = X² + Y²
10² = X² + Y²
X² + Y² = 100
By this equation, possible value of x and y is 6 and 8 respectively only 6 and 8 will satisfy the equation
So, X = 6 and Y = 8
Perimeter = 2(X+Y)
Perimeter = 2(6+8)
Perimeter = 2(14)
Perimeter = 28 cm
perimeter of the rectangle is 28cm
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What is the scale factor for the similar figures below?
The scale factor of the similar figure is 2.
What is scale factor?
Scale factor is the ratio of the length of a new object to the original object.
To calculate the scale factor of the similar figures, we use the formula below
Formula:
S.F = New length/Original length.................. Equation 1Where:
S.F = Scale factorFrom the diagram,
Given:
New length = 14Original length = 7Substitute these values into equation 1
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students in mr gonzales class are researching situations of exponitial decay and creating their graphs mr gonzales asked his students what the situations have in common and their responses are shown below
Therefore , the solution of the given problem of unitary method comes out to be it is consistently a constant proportion or percentage of the preceding value.
A unitary method is what?The task can be completed using the well-known minimalist technique, actual variables, and any essential components from the very first Diocesan specialised question. In response, customers can be given another opportunity to use the item. If not, significant effects on our comprehension of algorithms will disappear.
Here,
According to the students' responses, all instances of exponential decay share the following characteristics:
They begin with a baseline value. (y-intercept).
They get smaller with time. (or successive periods).
They get closer to a horizontal asymptote, which stands for the function's minimum or limit value.
The graphs also demonstrate that, although the rate of decay—or the rate at which values decrease—can vary from circumstance to circumstance,
it is consistently a constant proportion or percentage of the preceding value.
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help please due very soon
Answer:
(D) 7/10
Step-by-step explanation:
You want the rate of change of y with respect to x for the relation ...
(2/5)x -(4/7)y = 3/2
Slope-Intercept formSolving for y, we have ...
2/5x -3/2 = 4/7y . . . . . . . . . . add 4/7y -3/2
(7/4)(2/5)x -(7/4)(3/2) = y . . . . multiply by 7/4
7/10x -21/8 = y . . . . . . . . . . simplify
The rate of change is the coefficient of x: 7/10.
Let f(a) = 15a squared + 40a - 30 and a(b) = 3b -5 find f(b), then find the value of f when b = -3
In mathematics, an expression is a combination of numbers, variables, and/or operators that represents a mathematical phrase or equation. Therefore, when b = -3, f(b) = -15.
An expression can contain constants, variables, functions, and/or mathematical operators such as addition, subtraction, multiplication, division, exponentiation, and logarithms.
To find f(b), we need to substitute b for a in the expression for f(a):
f(b) = 15b^2 + 40b - 30
To find the value of f when b = -3, we substitute -3 for b in the expression above:
f(-3) = 15(-3)^2 + 40(-3) - 30
f(-3) = 135 - 120 - 30
f(-3) = -15
Therefore, when b = -3, f(b) = -15.
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Write the polynomial in standard form with roots of 1/4 and +5i
The polynomial with roots of 1/4 and +5i in standard form is:
f(x) = x² - (1/4)x² + 25x - (25/4)
To write the polynomial with roots of 1/4 and +5i in standard form, we need to use the fact that the roots of a polynomial are related to its factors. Specifically, if r is a root of a polynomial, then x - r is a factor of the polynomial.
Therefore, if the roots of our polynomial are 1/4 and +5i, then we know that the factors of the polynomial are:
(x - 1/4) and (x - 5i) and (x + 5i)
To get the polynomial in standard form, we need to multiply out these factors and simplify.
(x - 1/4) and (x - 5i) and (x + 5i) = (x - 1/4) and (x² - 25i²)
= (x - 1/4) and (x² + 25)
= x³ + 25x - (1/4)x² - (25/4)
Therefore, the polynomial with roots of 1/4 and +5i in standard form is:
f(x) = x³ - (1/4)x² + 25x - (25/4)
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