Option 2:
is the right answer
Step-by-step explanation:
Given fraction is:

To solve the fraction, Taking LCM in denominator and numerator

When the numerator and denominator both have fractions, the simplified form is obtained be multiplying the numerator with reciprocal of the denominator. So,

Hence,
Option 2:
is the right answer
Keywords: fractions, simplification
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-149 would be your answer
Answer:
The rate of the volume increase will be 
Step-by-step explanation:
Let's take the derivative with respect to time on each side of the volume equation.

Now, we just need to put all the values on the rate equation.
We know that:
dR/dt is 0.04 cm/s
And we need to know what is dV/dt when R = 10 cm.
Therefore using the equation of the volume rate:


I hope it helps you!