Answer:

Step-by-step explanation:
we know that
The volume of the cylinder is equal to

we have


substitute


Answer:
=
Step-by-step explanation:
{0}={} because 0 means that there is nothing and in null set too, there is no elements.
3h - 2(1 + 4h)
Multiply the bracket by -2:
3h -2 - 8h
Then, subtract the variables.
3h - 8h - 2
-5h - 2
∴The answer is -5h - 2