How do i solve this? i don't understand how i would even start this problem to solve it

Step-by-step explanation:

To start the problem, you recognize that the figure is a cone with a radius of 21 ft and a height if 12 ft.

Then, you consult your list of volume formulas to find the one for the volume of a cone. It is ...

  V = (1/3)πr²h . . . . . where r is the radius and h is the height

Fill in the given numbers and do the arithmetic.

  V = (1/3)π(21 ft)²(12 ft) = 1764π ft³ ≈ 5542 ft³

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If your calculator does not have a button for π, you can use 3.14159. Most spreadsheets will have a PI() function that will give this value.

what is all that apply?

to plot points   for x just start at the origin (middle) and go to the left however many times it say(if the number is a positive) if the number is a negative then go right however many times it says if it is 0 go nowhere

now keep you pencil there and go up however many times it says on y(if it is positive) if it is negative then go down however many times it says. if it says 0 go nowhere.

you have just plotted a point! now when you finish plotting all of them connect them with a ruler

plot each point as (-3, 7), (0,4), (3,1), (8,-4)   in the parenthesis on the left of the comma is x and the right is y.