Part c. the volume of a rectangular box is (x3 - 7x2 - 9x + 63) cubic units. determine the dimensions of the rectangular box by factoring the volume expression completely. show your work.

The last term is 63 so 3 might be a zero of the function;-

f(3) = 27 - 7*9 - 3*9 +63 = 27 - 63 - 27 + 63 = 0  so 3 is a zero and

therefore (x - 3) is a factor  of the volume function.

Long division  of the expression by x - 3 gives the quotient:-

x^2 + 4x - 21

Factoring this:-

= ( x + 7)(x - 3)

So the dimensions of the box are, x-3, x-3 and x+7  answer.

i believe the answer is d.

hope it you! : d

you didn't post any answer choices, so its not 100% clear what your teacher is looking for

however, log(15/7) is equivalent to log(15) - log(7)

i'm using the rule log(x/y) = log(x) - log(y)