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2 years ago

How far will a wheel of radius 7 cm travel in two revolutions

Mathematics

1 answer:

Svetllana [295]2 years ago

5 0

Answer:

87.92 cm

Step-by-step explanation:

The travel is 2 circumferences:

2C = 2*2πr = 4πr = 4*3.14*7 = 87.92 cm

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Diagram does not make sence 6 divided by 2/5 in a diagram

Aleksandr [31]

Answer:

I got 15.

Step-by-step explanation:

I used a calculator and 6 / (2/5) = 15

8 0

2 years ago

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What is the linear function equation represented by the graph? f (x) = ?

Alex Ar [27]

The equation is :
y = -.5/1 + 1

5 0

2 years ago

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A flagpole casts a shadow of 10ft long. A girl standing nnext to the flagpole casts a shadow 2.5 ft. long.If the girl is 5 ft. t

loris [4]

Since we know that they have to e similar, it is a 20ft tall flagpole. the shadow of the girl is half of her height, so since the flag pole shadow is 10ft it is simple 10 multiplied by 2

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3 years ago

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Use a graphing utility to graph the function and the damping factor of the function in the same viewing window.

Bas_tet [7]

Answer:

The function touches the damping factor

at x= $\frac{(4n-3)\pi}{2}$ and x= $\frac{(4n-1)\pi}{2}$

The x-intercept of f(x) is

at x= $n\pi$

Step-by-step explanation:

Given function is f(x)= $e^{-3x} sin(x)$ and damping factor as y= $e^{-3x}$ and y= $(-1)e^{-3x}$

To find when function touches the damping factor:

For f(x)= $e^{-3x} sin(x)$ and y= $e^{-3x}$

Equating the both the equation,

$e^{-3x} sin(x)=e^{-3x}$

$sin(x)=1$

x= $\frac{(4n-3)\pi}{2}$

For f(x)= $e^{-3x} sin(x)$ and y= $(-1)e^{-3x}$

Equating the both the equation,

$e^{-3x} sin(x)=(-1)e^{-3x}$

$sin(x)=(-1)$

x= $\frac{(4n-1)\pi}{2}$

Therefore, The function touches the damping factor x= $\frac{(4n-3)\pi}{2}$ and x= $\frac{(4n-1)\pi}{2}$

To find x-intercept of f(x):

For x-intercept, y=0

f(x)= $e^{-3x} sin(x)$

y= $e^{-3x} sin(x)$

$e^{-3x} sin(x)=0$

Hence, $e^{-3x}$ is always greater than zero.

Therefore, $sin(x)=0$

x= $n\pi$

Thus,

The x-intercept of f(x) is at x= $n\pi$

7 0

3 years ago

Abigail and her children went into a movie theater and she bought $71.50 worth of

snow_lady [41]

Answer: The number of drinks she bought would be 6 and the number of pretzels she bought would be 10. 

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3 years ago