Question

this experssion represents the volume of a sphere :

x^3-8x^2+18x

if x =4,what is the volume of the sphere


show your work.

Answer 1

Just plug in 4 for x

Answer 2

ok

Answer 3

Do you have a calculator?

Answer 4

yeah

Answer 5

put in
4^3-8*4^2+18*4 and hit the enter or = sign

Answer 6

what doy you get

Answer 7

i got 42 cubic units

Answer 8

You should get 8

did you type it in exactly like above... do you have the ^ key?

Answer 9

how

Answer 10

how?/////////////////////////////////

Answer 11

4^3 = 64
-8^4^2 = -128
18*4 = 72

64 - 128 + 72 = 8