You kayak up a river at a rate of 168 feet every 2 minutes. You kayak 56 feet every 30 seconds on the way back down the river. How much farther do you kayak in 5 minutes on the way down the river than in 5 minutes on the way up the river?/

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

perimeter of the base times height

step-by-step explanation:

yes, whats the problem?

the answer is 15 to your question