Last year, Chang opened an investment account with $8800 . At the end of the year, the amount in the account had decreased by 21.5% . How much is this decrease in dollars? How much money was in his account at the end of last year?

the final price would be 29.6925

step-by-step explanation:

39.59 minus 25% equals 29.6925

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