Answer:
pretty sure it's 9.
Step-by-step explanation:
square root of 81 is 9. 3 is its radius.
Answer
Find out the volume of a cylinder .
To prove
Formula

Where r is the radius and h is the height.
As given
Diameter of 12 in. and a height of 7 in.


Radius = 6 in

put all the values in the formula

= 791.28 in³
Therefore the volume of the cylinder is 791 .28 in³ .
Answer:
I think the answer is A but I am not for sure
Step-by-step explanation:
Answer:
Therefore the rate change of height is
m/s.
Step-by-step explanation:
Given that a vertical cylinder is leaking water at rate of 4 m³/s.
It means the rate change of volume is 4 m³/s.

The radius of the cylinder remains constant with respect to time, but the height of the water label changes with respect to time.
The height of the cylinder be h(say).
The volume of a cylinder is 


Differentiating with respect to t.

Putting the value 



The rate change of height does not depend on the height.
Therefore the rate change of height is
m/s.
Answer:
(4X-3)(3X^2-1)
Step-by-step explanation:
12X^3-9X^2-4X+3=
3X^2*(4X-3)-(4X-3)=
(4X-3)(3X^2-1)