Answer:
the answer is A which 2(1/7)
Square root (8-0)^2 + (8+7)^2
square root 64+15^2
=8+15
= 23
Answer:
The radius of the balloon is increasing at a rate of 4 feet per minute.
Step-by-step explanation:
We are given the following in the question:

Volume of sphere is given by

where r is the radius of the balloon.
Instant radius, r = 2 ft
Rate of change of volume =

Putting values, we get,

Thus, the radius of the balloon is increasing at a rate of 4 feet per minute.
A = < 90°
the measure of the angle is less than 90