Roger and Trish will have completed 11/30 of the homework if they work together for 1 hour.
To solve this problem
First, we need to find their individual rates of work, which is the reciprocal of the time it takes for each to complete the homework:
Roger's rate: 1/6 of the homework per hour
Trish's rate: 1/5 of the homework per hour
When they work together, their combined rate of work is the sum of their individual rates:
Combined rate: 1/6 + 1/5 = 11/30 of the homework per hour
After working together for 1 hour, they will have completed:
11/30 * 1 = 11/30 of the homework
Therefore, Roger and Trish will have completed 11/30 of the homework if they work together for 1 hour.
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Please help confused thank you
Answer:
Step-by-step explanation:
Typically you see f(x)=something like you do up in the original equation.
that is your function/graph.
a) f(0) means plug in 0 for x
f(0) = (-0)³-0²-0+13
f(0) = 13
b) f(2) =(-2)³-2²-2+13 >simplify the exponenents first
(-2)³ = (-2)(-2)(-2)= -8
f(2) = -8-4-2+13 >simplify work from left to right
f(2) = -12-2+13
f(2) = -14+13
f(2) = -1
c) f(-2) = [-(-2)]³-(-2)²-(-2)+13 >multiply - and - for (-(-2))³
f(-2) = (2)³-(-2)²-(-2)+13 >simplify exponents
f(-2) = 8-4-(-2)+13
f(-2) = 4-(-2)+13
f(-2) = 6+13
f(-2) = 18
d) means add f(1) and f(-1)
f(1) +f(-1) = (-1)³-1²-1+13 +[-(-1)]³-(-1)²-(-1)+13
f(1) +f(-1) = -1-1-1+13 +[1]³-1-(-1)+13
f(1) +f(-1) = -1-1-1+13 +1-1+1+13
f(1) +f(-1) = -2-1+13 +1-1+1+13
f(1) +f(-1) = -3 +13 +1-1+1+13
f(1) +f(-1) = 10+1-1+1+13
f(1) +f(-1) = 11 -1+1+13
f(1) +f(-1) = 10 +1 +13
f(1) +f(-1) = 24
The point R(1,– 2) is translated 2 units down. What are the coordinates of the resulting point, R'?
The coordinates of the resulting point, R', are (1,-4).
What are the coordinates of the resulting point, R'?A translation is a type of transformation in geometry that moves a point or an object from one place to another without changing its size, shape, or orientation.
To translate a point, you need to specify the direction and distance of the movement.
Given that:
The point R(1,-2) is being translated 2 units down, which means that it will move vertically downwards by a distance of 2 units.
The x-coordinate will remain the same, as the movement is only in the y-direction.
So, to find the coordinates of the resulting point, R', we subtract 2 from the y-coordinate of the original point R:
R' = (1, -2 - 2)
R' = (1, -4)
Therefore, resulting coordinates of R' are (1,-4).
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Choose as many answers as apply. Which are stated goals for this class? Explain the basics of home mortgages. Increase your knowledge of consumer applications and personal financial management. O Help students develop their ability to apply math concepts to real-world problems. Provide students with the tools to plan for retirement.
The following are stated goals for this class:
1. Help students develop their ability to apply math concepts to real-world problems.
2. Increase your knowledge of consumer applications and personal financial management.
3. Explain the basics of home mortgages.
These goals are aimed at providing students with practical skills and knowledge that can be applied to their everyday lives, such as managing personal finances, understanding the mortgage process, and planning for retirement.
By learning math concepts in the context of real-world situations, students are better equipped to make informed decisions and solve problems that they may encounter in their personal and professional lives.
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Pleas help and I will mark your brainliest. It is simple matrix work!
The inverse of matrix C is C⁻¹ = [1/9 4/27] [1/27 -5/27].
How to determine inverse of matrix?To find the inverse of matrix C, use the following formula:
C⁻¹ = 1/det(C) × adj(C)
where det(C) = determinant of matrix C and adj(C) = adjugate of matrix C.
To find the determinant of C, use the following formula for a 2x2 matrix:
|a b|
|c d| = ad - bc
So:
det(C) = |5 1|
|12 -3| = (5)(-3) - (1)(12) = -27
Find the adjugate of C, which is the transpose of the matrix of cofactors of C, which is:
|-3|
| 1| = -(-3) = 3
So the upper left cofactor is 3, which is:
|12|
|-3| = -(12) = -12
So the upper right cofactor is -12, which is:
| 1|
|-3| = -(1) = -1
So the lower left cofactor is -1, which is:
|5|
|1| = 5
So the lower right cofactor is 5. Putting the cofactors into a matrix and transposing it gives the adjugate of C:
adj(C) = [ 3 -12]
[-1 5]
Now find the inverse of C:
C⁻¹ = 1/det(C) × adj(C)
= -1/27 × [ 3 -12]
[-1 5]
= [1/9 4/27]
[1/27 -5/27]
So the inverse of matrix C is:
C⁻¹ = [1/9 4/27]
[1/27 -5/27]
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Julian is using a biking app that compares his position to a simulated biker traveling Julian's target speed. When Julian is behind the simulated biker, he has a negative position.
Julian sets the simulated biker to a speed of
20
km
h
20
h
km
20, start fraction, start text, k, m, end text, divided by, start text, h, end text, end fraction. After he rides his bike for
15
1515 minutes, Julian's app reports a position of
−
2
1
4
km
−2
4
1
km minus, 2, start fraction, 1, divided by, 4, end fraction, start text, k, m, end text.
What has Julian's average speed been so far?
To solve the problem, we need to find Julian's average speed, given that he started biking from a position behind the simulated biker at a speed of 20 km/h, and after 15 minutes, his position was reported as -214 km.
We can use the formula for average speed:
Average speed = total distance / total time
To find the total distance, we need to calculate the displacement of Julian from the initial position of -d (where d is the distance between Julian and the simulated biker when he started biking) to the position of -214 km after 15 minutes.
Displacement = final position - initial position
Displacement = (-214 km) - (-d) = d - 214 km
The total distance covered by Julian is equal to the absolute value of the displacement, since the direction of the motion does not matter when computing distance.
Total distance = |d - 214 km|
To find the total time, we need to convert 15 minutes to hours:
Total time = 15 minutes / 60 minutes/hour = 0.25 hours
Now we can substitute the values into the formula for average speed:
Average speed = total distance / total time
Average speed = |d - 214 km| / 0.25 hours
Since Julian was traveling at a constant speed of 20 km/h, we can also express the distance in terms of time:
Average speed = (20 km/h) x t / 0.25 hours
where t is the time Julian biked in hours.
Setting the two expressions for average speed equal to each other, we can solve for t:
|d - 214 km| / 0.25 hours = (20 km/h) x t / 0.25 hours
|d - 214 km| = 20 km/h x t
Solving for t:
t = |d - 214 km| / 20 km/h
Now we can substitute this expression for t into either expression for average speed:
Average speed = (20 km/h) x t / 0.25 hours
Average speed = |d - 214 km| / 0.25 hours
Substituting the expression for t:
Average speed = |d - 214 km| x 4 / |d - 214 km|
Simplifying:
Average speed = 80 km/h
Therefore, Julian's average speed so far has been 80 km/h.
Need help with number 1!! Pleaseee
Answer:
Step-by-step explanation: find the circumference and then consider the shape (circle) after that get rid of options that don't make sense like 7.3 and 7.1, 8 for the radius might be too big leaving you with 7 (use a calculator if needed)
Select all equations that have infinitely many solutions
2nd and 4th is correct. Hope you got it!
what is the range of the data set
Answer: 9
Step-by-step explanation:
Range = maximum number - minimum number (in a data set)
50-41 = 9 minutes
Michelle has 3 kg of strawberries that she divided equally into small bags with 15 kg in each bag.
a. How many bags of strawberries did she make?
In a case whereby Michelle has 3 kg of strawberries that she divided equally into small bags with 1/5 kg in each bag the number of bags of strawberries she make is 15bags of strawberries.
How can the number of the bags of strawberries be calculated?We should note that 1kg = 1000g
3kg = 1000g
Since each of the bag is 1/5 kg = 1000/5 g = 200g
The needed bag will now be =3000/200= 15
Therefore, we can see that she made 15bags of strawberries the conversion were made so that it can be calculated easily since ythe kg are very small.
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algebra hw I will give brainlyest
The other value of x where g(x) = 15 is 16 in the absolute value function
Finding the value of xSince the vertex of the absolute value function is at (10,0), the equation for the function can be written as:
g(x) = a|x - 10|
To find the value of a, we can use the fact that the function passes through the point (4,15):
15 = a|4 - 10|
15 = 6a
a = 2.5
So the equation for the absolute value function is:
g(x) = 2.5|x - 10|
To find another value of x where g(x) = 15, we can set the equation equal to 15 and solve for x:
2.5|x - 10| = 15
|x - 10| = 6
x - 10 = 6 or x - 10 = -6
x = 16 or x = 4
Therefore, there are two possible values of x where g(x) = 15: x = 16 and x = 4.
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Camping A guy rope is attached to the top of a tent pole. The guy rope is pegged into the ground 5 feet from the tent. If the guy rope is 11 feet long, how long is the tent pole?
If mZRST = 70, mZQST = 2x, and mZQSR = 3x - 10, what is the mZQSR
16
48
32
38
Thus, the value of x for the given set of adjacent angles is found as: x = 16 and m∠QSR = 38.
Explain about the adjacent angles:If two angles share a side and a vertex, they are said to be neighbouring in geometry. In other words, neighbouring angles do not overlap and are placed next to one another immediately.
We may infer from our criteria and the aforementioned instances that any pair of neighbouring angles has a shared vertex and a common side. They really aren't adjacent if one of these elements is absent. By searching for these two characteristics, we can categorise pairs of angles as neighbouring or not adjacent.There are numerous unique connections between angles in pairs. You can recognise other angle connections, such as supplementary and complementary angles, by recognising nearby angles.Given data:
m∠RST = 70, m∠QST = 2x, and m∠QSR = 3x - 10From the figure:
m∠RST = m∠QST + m∠QSR
Put the values
70 = 2x + 3x - 10
5x = 80
x = 16
Thus,
m∠QSR = 3x - 10 = 3(16) - 10
m∠QSR = 38
Thus, the value of x for the given set of adjacent angles is found as: x = 16 and m∠QSR = 38.
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Complete question:
If m∠RST = 70, m∠QST = 2x, and m∠QSR = 3x - 10, what is the m∠QSR?.
The figure is attached:
16
48
32
38
10. The time it takes to drain a swimming pool varies inversely with the amount of water being
pumped per hour. If a large pool takes 12 hours to empty at 400 gallons an hour, how many
hours faster can the pool be drained if the pumping rate is increased to 500 gallons per hour?
(teal)
To solve this problem, we can use the formula for inverse variation, which is:
time = k/ rate
where k is a constant of proportionality.
We can start by finding the value of k using the given information. We know that when the pumping rate is 400 gallons per hour, it takes 12 hours to drain the pool. Therefore:
12 = k/400
Multiplying both sides by 400 gives us:
k = 4800
Now we can use this value of k to answer the second part of the question. We want to know how many hours faster the pool can be drained if the pumping rate is increased to 500 gallons per hour. Let's call this new time t:
t = 4800/500
t = 9.6 hours
So the pool can be drained 12 - 9.6 = 2.4 hours faster if the pumping rate is increased to 500 gallons per hour.
solve for x in the diagram
Answer:
15.04 (3.s.f)
Step-by-step explanation:
Cos a = adjacent/ hypotenuse
Cos 43 = 11/ x
so,
x= 11 / cos 43
= 15.04
The earrings that Mrs.Moore wants to buy are $55.00. She won’t buy them until they are at least 45% off. What is the most that Mrs.Moore is willing to spend?
Answer:
$30.25
Step-by-step explanation:
55% of 55$ is $30.25. she wants 45 % off of 55$. which is $24.75. 55-24.75 is 30.25
$30.25
since it's 45% off, you need to subtract 45% from 100%
100%-45%=55%
then turn the % into a decimal
55%/100=0.55
now multiply the original price by 0.55
0.55*55=30.25
Write the Hindu-Arabic numeral 872 as a Babylonian numeral.
Use the symbols shown below, and put one space between different place value positions, if necessary.
I = 1
< = 10
Answer:
To write the Hindu-Arabic numeral 872 as a Babylonian numeral using the symbols I and <, we need to break it down into its place values:
The digit 8 is in the hundreds place.
The digit 7 is in the tens place.
The digit 2 is in the ones place.
To represent 800 in the hundreds place, we use 8 symbols <. To represent 70 in the tens place, we use 7 symbols < followed by 1 symbol I. To represent 2 in the ones place, we use 2 symbols I.
Putting these symbols together, we get the Babylonian numeral:
<<<<< <<<< <<<< <<<< IIII
So, the Babylonian numeral equivalent of the Hindu-Arabic numeral 872 is <<<<< <<<< <<<< <<<< IIII.
to help open up a restaurant Alonzo borrowed money from his Credit Union.
he took out a personal amortized loan for $49,000 at an interest rate of 6.55% with monthly payments for a term of 6 years. is Alonso pays the monthly payment each month for the full term find his total amount to repay the loan
If Alonso pays the monthly payment each month for the full term. Alonzo will repay a total of $59,389.2 over the 6-year term of the loan if he makes the monthly payment each month.
How to find the total amount?To calculate the total amount that Alonzo will repay over the 6-year term of the loan, we need to use the formula for the monthly payment on an amortized loan:
M = P * (r/12) * (1 + r/12)^n / ((1 + r/12)^n - 1)
where:
M is the monthly payment
P is the principal amount
r is the monthly interest rate (which is the annual interest rate divided by 12)
n is the total number of payments (which is the number of years multiplied by 12).
Using the values given in the problem, we have:
P = $49,000
r = 6.55% / 12 = 0.005458333 (monthly interest rate)
n = 6 years * 12 months/year = 72
Substituting these values into the formula, we get:
M = $49,000 * 0.005458333 * (1 + 0.005458333)^72 / ((1 + 0.005458333)^72 - 1)
= $824.85 (rounded to the nearest cent)
To find the total amount he will repay, we can simply multiply the monthly payment by the number of payments:
Total amount =$824.85 * 72
Total amount = $59,389.2
Therefore, Alonzo will repay a total of $59,389.2 over the 6-year term of the loan if he makes the monthly payment each month.
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In the quadratic formula, the number for a is filled in with the coefficient of x
In the quadratic formula, the number for "a" is filled in with the coefficient of x².
What is a quadratic equation?In Mathematics and Geometry, a quadratic equation can be defined as a mathematical expression that can be used to define and represent the relationship that exists between two or more variable on a graph.
In Mathematics, the standard form of a quadratic equation is represented by the following equation;
ax² + bx + c = 0
Mathematically, the quadratic formula is represented by this mathematical equation:
[tex]x = \frac{-b\; \pm \;\sqrt{b^2 - 4ac}}{2a}[/tex]
For instance, given the quadratic equation 2x² - 3x - 1 = 0, we have:
a = 2
b = -3
c = -1
[tex]x = \frac{-(-3)\; \pm \;\sqrt{(-3)^2 - 4(2)(-1)}}{2(2)}\\\\x = \frac{3\; \pm \;\sqrt{9 + 8}}{4}\\\\x = \frac{3\; \pm \;\sqrt{17}}{4}[/tex]
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A population of rabbits is increasing at a rate of 1.5% per month. If there are 60 rabbits today, how many will there be after 10 months? Round to the nearest whole.
If population of rabbits is increasing at a rate of 1.5% per month, after 10 months, there will be approximately 71 rabbits in the population.
To solve this problem, we need to use the formula for exponential growth:
A = P(1 + r)ᵗ
where A is the final amount, P is the initial amount, r is the growth rate as a decimal, and t is the time period. In this case, we have P = 60, r = 0.015 (1.5% expressed as a decimal), and t = 10.
Plugging these values into the formula, we get:
A = 60(1 + 0.015)¹⁰
A ≈ 71
t's important to round to the nearest whole, so we can't be exact, but we know the answer will be somewhere between 70 and 72 rabbits.
Exponential growth is a model that assumes continuous growth over time, which may not be entirely accurate in real-world scenarios.
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Wendy is customizing shirts for the debate team. She can choose from 8 styles, 7 colors, and 7 collars. How many different shirts is it possible for Wendy to customize?
Answer:
392 conbinations
Step-by-step explanation:
multiply all 3 numbers to find conbinations.
8x7x7
=56x7(or 49x8)
=392
its prob wrong cuz i guessed so yeah
The graph of line T passes throug the points listed beow.
(a,-b)and (-C,d) Line s is parallel to linet. What is the slope of line s?
Therefore, the slope of line s is equal to (d + b) / (a - c).
What is slope?In mathematics, the slope is a measure of the steepness of a line. It is defined as the ratio of the vertical change (rise) between two points on the line to the horizontal change (run) between those same two points. In other words, the slope is the change in the y-coordinate divided by the change in the x-coordinate. If the slope is positive, the line is increasing from left to right and has an upward direction. If the slope is negative, the line is decreasing from left to right and has a downward direction. If the slope is zero, the line is horizontal. If the slope is undefined, the line is vertical. The concept of slope is important in various fields of mathematics, science, and engineering, as it helps to describe the relationship between two variables and make predictions based on that relationship. It is also used in calculus to find the rate of change of a function, and in geometry to find the equation of a line or the angle between two lines.
Here,
Since line s is parallel to line t, it has the same slope as line t. The slope of a line passing through two points (x₁, y₁) and (x₂, y₂) can be calculated using the formula:
slope = (y₂ - y₁) / (x₂ - x₁)
In this case, the points on line t are (a, -b) and (-c, d), so the slope of line t is:
slope of t = (d - (-b)) / (-c - a)
slope of t = (d + b) / (a - c)
Since line s is parallel to line t, it has the same slope as line t:
slope of s = (d + b) / (a - c)
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he table of values represents a quadratic function.
Write an equation of the function in standard form.
The equation of the quadratic function in standard form is f(x) = 5x² - 3x - 7
To write an equation for a quadratic function in standard form, we need to use the general form of the equation, which is: f(x) = ax² + bx + c where a, b, and c are constants that determine the shape and position of the graph of the function.
Let's choose the points (-2, -16), (-1, -15), and (0, -12) from the table. Substituting these values into the equation above, we get:
-16 = 4a - 2b + c -15 = a - b + c -12 = c
We can use the third equation to solve for c, which is -12 in this case. Substituting this value into the first two equations, we get:
-16 = 4a - 2b - 12 => 4a - 2b = 4 -15 = a - b - 12 => a - b = 3
Now we have two equations in two unknowns, which we can solve by substitution or elimination. Let's use substitution to solve for b first:
a - b = 3 => b = a - 3
Substituting this into the first equation, we get:
4a - 2(a - 3) = 4 => 2a = 10 => a = 5
Now we can substitute the values of a and b into one of the original equations to find c:
-15 = 5 - b + c => -15 = 5 - (5 - 3) + c => c = -7
Therefore, the equation of the quadratic function in standard form is:
f(x) = 5x² - 3x - 7
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A science class measured the mass of an amount of sand.about how many grains of sand are there in 7 grams of sand
Therefore , the solution of the given problem of expressions comes out to be there are roughly 7,000 grains of sand in 7 grammes of sand.
What exactly is an expression?Instead of using random estimates, it is preferable to use shifting numbers that may also prove increasing, reducing, variable or blocking. They could only help one another by trading tools, information, or solutions to issues. The justifications, components, or quantitative comments for tactics like further disagreement, production, and blending may be included in the assertion of truth equation.
Here,
A kilogramme (1000 grammes) of sand is thought to contain around 1 million grains of sand. This indicates that 1 gramme of sand contains roughly 1000 grains of sand.
Using this calculation, we can determine how many sand grains there are in 7 grammes roughly as follows:
=> Number of sand grains in 7 grammes = (# of sand grains in 1 gramme) x (7 grams)
=> 1000 x 7 = the number of sand grains in 7 grammes.
=> 7,000 sand grains are included in 7 grammes.
In accordance with this calculation, there are roughly 7,000 grains of sand in 7 grammes of sand.
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Help pleaseeeee I would appreciate it
The answers of the matrix of A after adding -5 times row 1 to row 3 of matrix is
1 -1 5 | -1
1 -1 -4 | 5
0 9 -25 | 4
What is a matrix in mathematics ?A matrix is described as a rectangular array or table of numbers, symbols, or expressions, arranged in rows and columns, which is used to represent a mathematical object or a property of such an object.
Matrices are useful for describing systems of linear or differential equations, as well as representing a linear application.
We perform the row operation and have:
1 -1 5 | -1
1 -1 -4 | 5
0 9 -25 | 4
The result after adding -5 times row 1 to row 3 of matrix is shown below:
1 -1 5 | -1
1 -1 -4 | 5
0 9 -25 | 4
In conclusion, in a matrix function, the input and the output values are matrices.
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AABC-ADEC. 1 and 2 have the same measure. Find DC and
DE. (Hint: Let DC = x and AC=x+4, Use the figure shown to the right.)
DC is unit(s) long.
(Round to the nearest tenth as needed.)
D
4
A
14
E
B
Answer: Since 1 and 2 have the same measure, angle CED is also equal to 1 and 2. Therefore, triangle CED and triangle CAB are similar by the Angle-Angle (AA) criterion.
Using the properties of similar triangles, we can set up the following proportion:
$\frac{CE}{CA}=\frac{CD}{CB}$
Substituting the given values:
$\frac{CE}{x+4}=\frac{x}{14}$
Cross-multiplying:
$14CE = x(x+4)$
$14CE=x^2+4x$
We also know that triangle ADE and triangle ABC are similar by the AA criterion. Therefore, we can set up the following proportion:
$\frac{DE}{AB}=\frac{AE}{AC}$
Substituting the given values:
$\frac{DE}{18}=\frac{AE}{x+4}$
Cross-multiplying:
$AE = 18\frac{DE}{x+4}$
Now, we can substitute the value of $AE$ in terms of $DE$ into the first equation:
$14CE=x^2+4x$
$14\frac{DE}{x+4}=x^2+4x$
$14DE=x^2+4x(x+4)$
$14DE=x^2+4x^2+16x$
$18x^2+16x-14DE=0$
We can now use the quadratic formula to solve for $x$:
$x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$
$x=\frac{-16\pm\sqrt{(16)^2-4(18)(-14DE)}}{2(18)}$
$x=\frac{-16\pm\sqrt{256+1008DE}}{36}$
Since $DC=x$, we can now use this equation to find the value of $DC$ for a given value of $DE$. For example, if $DE=5$, we have:
$DC=\frac{-16\pm\sqrt{256+1008(5)}}{36}$
$DC\approx 2.3$ or $DC\approx -3.1$
Since distance cannot be negative, we choose the positive solution:
$DC\approx 2.3$ units.
To find $DE$, we can substitute the value of $DC$ back into one of the earlier equations:
$\frac{CE}{x+4}=\frac{x}{14}$
$\frac{CE}{2.3+4}=\frac{2.3}{14}$
$CE\approx 1.34$ units
Now we can use the second similarity proportion to find $DE$:
$\frac{DE}{18}=\frac{AE}{x+4}$
$\frac{DE}{18}=\frac{18-1.34}{2.3+4}$
$DE\approx 3.64$ units
Therefore, $DC\approx 2.3$ units and $DE\approx 3.64$ units.
Step-by-step explanation:
bacteria in a culture is given by function n(t)=920e^0.35t
A) The continuous rate of growth of this bacterium population = 0.35
B) The initial population of the culture = 920
C) The number of bacteria at time t=5 are 5294
Here, the function [tex]n(t)=920\times e^{(0.35\times t)}[/tex] represents the number of bacteria in a culture at time t
A) We know that in exponential function f(x) = [tex]ae^{kx}[/tex], k is the rate of growth
Here, in this function n(t) = [tex]920\times e^{(0.35\times t)}[/tex], the continuous rate of growth is 0.35
B) To find the initial population of the culture
Substitute t = 0, in n(t)
n(0) = [tex]920\times e^{(0.35 \times 0 )}[/tex]
n(0) = 920 × e⁰
n(0) = 920
This is the initial population.
C) Now we find the number of bacteria at time t=5
[tex]n(t)=920\times e^{(0.35\times t)}[/tex]
Substitute t = 5 in above equation.
n(5) =[tex]920 \times e^{(0.35 \times 5)}[/tex]
n(5) = 5294.23
n(5) ≈ 5294
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The number of bacteria in a culture is given by the function
n(t) =920e^0.35t Where t is measured in hours
A) what is the continuous rate of growth of this bacterium population? Your answer is __ percent
B) what is the initial population of the culture (at t=0) your answer is __
C) how many bacteria will the culture contain at time t=5 ? Your answer is __ Round to the nearest bacteria
-5-4-3-2
y
5
3
+ do
Mark this and return
23
Which equation represents a circle with the same
radius as the circle shown but with a center at (-1, 1)?
(x-1)2 + (y + 1)² = 16
(x-1)² + (y + 1)² = 4
(x + 1)² + (y-1)² = 4
O(x + 1)² + (y-1)² = 16
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Submis
The equation that represents the circle is (x + 1)² + (y - 1)² = 16
Writing the equation that represents a circleThe equation of a circle with center (h,k) and radius r is:
(x - h)² + (y - k)² = r²
To find the equation of the circle with center (-1,1) and radius 4, we need to shift the center of the circle to (-1,1).
We can do this by replacing x with (x - (-1)) = (x + 1) and y with (y - 1) in the equation of the original circle. This gives:
(x + 1)² + (y - 1)² = 16
This equation represents a circle with center (-1,1) and radius 4.
Therefore, the correct option is (O) (x + 1)² + (y - 1)² = 16.
The other options do not have the correct center or radius to describe the circle.
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Help please i would appreciated it
here is the picture is about Row Ops
The matrix operation add -4(row 1) to row 3 is[tex]\left[\begin{array}{ccc | c}1&2&1 & -5\\0&4&-2 & 3\\0&-9&2&12\end{array}\right][/tex]
Evaluating the matrix expressionFrom the question, we have the following parameters that can be used in our computation:
[tex]\left[\begin{array}{ccc | c}1&2&1 & -5\\0&4&-2 & 3\\4&-1&6&-8\end{array}\right][/tex]
From the question, we understand that
We are to add -4(row 1) to row 3
This means that
row 3 = row 3 - 4 * row 1
When these values are evaluated, we have
4: 4 - 4 * 1 = 0
-1: -1 - 4 * 2 = -9
6: 6 - 4 * 1 = 2
-8: -8 - 4 * -5 = 12
This means that we relace 4, -1, 6, and -8 in row 3 with 0, -9, 2 and 12
Using the above as a guide, we have the following:
[tex]\left[\begin{array}{ccc | c}1&2&1 & -5\\0&4&-2 & 3\\0&-9&2&12\end{array}\right][/tex]
Hence, the result of the matrix expression is [tex]\left[\begin{array}{ccc | c}1&2&1 & -5\\0&4&-2 & 3\\0&-9&2&12\end{array}\right][/tex]
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The table shown below lists the U.S. presidents and their ages at inauguration. President Cleveland has two entries because he served two nonconsecutive terms.
Find the mean and the population standard deviation of the ages. Round each result to the nearest tenth.
mean
population standard deviation
The mean age of the U.S. presidents at inauguration is 54.7 years and the population standard deviation is approximately 5.7 years.
To find the mean and population standard deviation of the ages of the U.S. presidents at inauguration, we first need to calculate the sum of the ages and the number of presidents in the data set.
The sum of the ages is:
57 + 61 + 57 + 57 + 58 + 57 + 61 + 54 + 68 + 51 + 49 + 64 + 50 + 48 + 65 + 52 + 56 + 46 + 54 + 49 + 50 + 47 + 55 + 55 + 54 + 42 + 51 + 56 + 55 + 51 + 54 + 51 + 60 + 62 + 43 + 55 + 56 + 61 + 52 + 69 + 64 + 46 + 54 + 47 = 2,405
There are 44 presidents in the data set.
Therefore, the mean age is:
mean = sum of ages / number of presidents = 2,405 / 44 = 54.7
To find the population standard deviation, we first need to calculate the sum of the squared deviations from the mean:
(57 - 54.7)² + (61 - 54.7)² + ... + (47 - 54.7)² = 3,391.5
Then, we divide the sum of squared deviations by the number of presidents and take the square root:
population standard deviation = √(3,391.5 / 44) ≈ 5.7
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College Trig Question!!!!!!!!!!!!!!
The equation, for the simple harmonic motion of a particle moving uniformly is s ( t ) = A x cos (ωt).
How to find the equation ?An object undergoing simple harmonic motion follows a periodic oscillation in a straight line, resembling a sinusoidal curve. Likewise, when an object continuously traverses upon a circle with uniform motion, its projection along the diameter travels back and forth in a simple harmonic motion pattern.
Assuming that the particle commences at the highest point of the simple harmonic motion at time t = 0, either the sine or cosine function is utilized to derive the equation for the simple harmonic motion formula. Thus, let us employ the cosine function in this instance:
s ( t ) = A x cos (ωt)
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