Answer:

since base is pi r^2

it's given that h=4r

now find derivative
× dr/dt
r=8 , dv/dt = 3
dv/dt = 4pi (8)^2 ×3 = 768pi
Answer:
9 that is the answer.....
1 is 4a+15b
2 is 5x-4
3 is 2x-22
4 is 8x-21
5 is 25x + 55
6 is 55x - 17
The shaded region is a parallelogram.
The formula for the area of any parallelogram is

.
The base of the parallelogram is 2 meters long (given).
The height of the parallelogram is 9 meters (do not be fooled by the unnecessary information of 14 meters)
The height is 9 meters because the height has to be perpendicular to the base. Thus, the side length must be 9 meters.
Multiply them together.

The area of the parallelogram is 18 square meters.