Answer:
A is wrong
Step-by-step explanation:
Assuming the question marks are minus signs
to find max, take derivitive and test 0's and endpoints
take derivitive
f'(x)=18x²-18x-108
it equal 0 at x=-2 and 3
if we make a sign chart to find the change of signs
the sign changes from (+) to (-) at x=-2 and from (-) to (+) at x=3
so a reletive max at x=-2 and a reletive min at x=3
test entpoints
f(-3)=83
f(-2)=134
f(3)=-241
f(4)=-190
the min is at x=3 and max is at x=-2
Answer: D. -40x^3+25x^2+45x
193.67 x 12= 2316
1 year=$2316
2316 x 30years= 69,480
120,182.07 -69,480=50,702.07
12/6 +7 *2 =16 if you just plugin the variables
