Step-by-step explanation:
The answer will be 9 I hope this help you
Volume = Area * height
= (pi/4)*D^2 * h
= (pi/4)*(40)^2 * 30
= 37,680 mm3
so, the answer is (a)
Answer:

Step-by-step explanation:
So we have the equation:

And we want to solve for x.
First, combine like terms on the left side:

Subtract 4 from both sides:

The left side cancels. Subtract on the right:

Divide both sides by 2. The left side cancels again:

So, the value of x is 8.
And we're done!