The original formula for the volume of a cone is

O.K. You give the approximate value of pi in the formula.

We have:

Substitute:

Answer: 7 cm.
Answer:
The scale factor is 4
Step-by-step explanation:
Divide one of the sides on the larger shape with the corresponding side on the smaller shape. So if you choose the top one you would to 40/10 which is 4.
The final answer is choice C) cos(x)Have a look at the attached image to see my work on how I got that answer.