A 20-sided die is rolled. A) Find the probability that the die shows a number greater than 15.

B) Find the probability that the die shows an even number.

C) Find the probability that the die shows a number that is not 5, 6, 7, or 8.

D) Find the probability that the die shows a number that is Prime.

A) .25 or 25% or 1/4

B) .50 or 50% or 1/2

C) .55 or 55% or 11/20

D) .4 or 40% or 2/5

hello from mrbilldoesmath!

answer:   x (x+6)^2, choice b

discussion:

factor x out of the equation:

x^3 + 12x^2 + 36x = x (x^2 + 12x + 36).

note that 6+6 = 12 and 6*6 = 36 so the above factors into:

x (x+6)^2

which is choice b

you,

mrb