4 I think because you subtract all since it's 60 min
(9x^2-4)..........................
Answer:

Step-by-step explanation:
<u>Expression is represented as:</u>

<u>Solve what's inside the parentheses:</u>

<u>Include exponent outside parentheses:</u>

This exponent represents 2 to the power of 150.
The volume of a cylinder is pir^2h. So the answer is pi*4^2 times 4. 64 pi.