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romanna [79]
3 years ago
14

PLEASE HELP!!!!!!

Mathematics
2 answers:
inna [77]3 years ago
7 0
7 1/2 is the answer . Use LCM to find
quester [9]3 years ago
6 0

B

First you have to change 2 1/2 into 5/2

To multiply fractions use the method
Keep Change Flip

5/2 x 3/1 =15/2

Which simplifies to 7 1/2
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Murrr4er [49]

Answer:

B is your answer to this problem

Step-by-step explanation:

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3 years ago
Let A(t) be the area of a circle with radius r(t), at time t in min. Suppose the radius is changing at the rate of drdt=6 ft/min
mylen [45]

Answer:

The rate of change is 108\pi ft^(2)/min

Step-by-step explanation:

The area of a circle is given by the following equation:

A(t) = \pi r^{2}

To solve this question, we have to realize the implicit differentiation in function of t. We have two variables, A and r. So

\frac{dA(t)}{dt} = 2\pi r \frac{dr}{dt}

We have that:

\frac{dr}{dt} = 6, r = 9.

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Since the area is in square feet, the rate of change is in ft^(2)/min.

So the rate of change is 108\pi ft^(2)/min

5 0
2 years ago
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pochemuha
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3 years ago
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Bad White [126]

Answer:

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