Answer:
or simplified would be 
Step-by-step explanation:
In order to calculate the rate of change, we must subtract his end position and end time by the starting position and starting time. We are using the -15 feet since it is below the surface area as the starting position and the 10 seconds as the starting time. We make each of these into a fraction and subtract like so...
rate of change
rate of change
= rate of change
Therefore, we can see that the rate of change of the diver is
or simplified would be 
I'm guessing these problems are meaning multiplication in which you need to multiply them but don't worry here is your answer.
6 * 36,200 = (217,200)
21 * 8,050 = (169,050)
Subtract your totals which gives you (48,150) is your answer!
Hope this helps.
Have a great day!!!
Volume = pi * r^2 * h
h = 3r
pi * r^2 * (3r) = 24 pi
3r^3 = 24
r^3 = 8
r = 2
Height = 3*2 = 6 units
B.
8.000 km because you round 9,162 down to 9,000 and round 969 to 1000 then subtract