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3 years ago

8

The area a equals pi R squared of a circular water ripple changes with the radius. At what rate does the area change with respec

t to the radius when r equals 4

1 answer:

scoray [572]3 years ago

6 0

Answer: πr2

Step-by-step explanation:

πr4

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Answer:

1

Step-by-step explanation:

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2 years ago

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Answer:

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2 years ago

The points (-15, r) and (-3, 16) lie on a line with slope 5/4. Find the missing coordinate r.

Setler79 [48]

Answer:

r = 1

Step-by-step explanation:

we know that :

$Slope=\frac{y_{B}-y_{A}}{x_{B}-x_A}$

Then

$\frac{5}{4} =\frac{16-r}{-3-(-15)}$

Then

$\frac{5}{4} =\frac{16-r}{12}$

Then

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Then

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Then

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Then

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4 0

1 year ago

The diameter of a quarter is 24.26 mm. Find the area

Vinil7 [7]

R=12.13
A=pi×r²
A=pi×12.13²
A≈462.2442041
A≈462.2 (to the nearest tenth).

So the answer is A≈462.2.

6 0

3 years ago

To eliminate the y-terms and solve for x in the fewest steps, by which constants should the equations be multiplied by before ad

Kryger [21]

Answer:

The first equation should be multiplied by 9 and the second equation by −4

Step-by-step explanation:

Given the simultaneous equation

First Equation: 5x − 4y = 28

Second equation: 3x - 9y = 30

In order to eliminate y, we must make the coefficient of x in both expression to be equal.

To do that the first equation should be multiplied by 9 (negative value of the coefficient of y in equation 2)and the second equation by -4( (coefficient of y in equation 1)

7 0

2 years ago