Try doing A, 2/3 Hopefully it helps you, I'm not good with fractions.
Use the depreciation formula.

Where 'p' is the principal value, 'r' is the rate it depreciates, and 'n' is the time. Just plug in what we know:

Simplify by subtracting:

Simplify the exponent:

Multiply:
The answer for the following is B
Answer:
I am pretty sure it is option a and c
Sorry if i am wrong
The formula for the area of a cylinder is 
×h
First, we do not have to worry about pi because we are leaving our answer in terms of it so we can move on to the radius squared.
The radius is halfway across a circle so our radius would be 4 and we have to square that and we will get a product of 16.
Lastly, we have to multiply 16 by 8 because 8 is the height of the cylinder
16 × 8 = 128
Therefore, the volume of the cylinder would be 128
in.³