Factor completely −3x3 + 12x2.

A. −x(3x2 − 12x)
B. −3x2(x − 4)
C. 3x(−x2 + 4x)
D. 3x2(−x + 4)

B. −3x² (x − 4)

Step-by-step explanation:

-3x³ + 12x²

-3x² ( x - 4 )  ⇒ B

80π/3 or about 83.775

step-by-step explanation:

since a cone is 1/3 of a cylinder, we need to find the base's area. since area = πr^2, we get 16π. then, multiplying this by 5, we get 80π. dividing by 3, since the cone's volume is 1/3 of that of a cylinder's, we get 80π/3.

hope this !