Indicate the answer choice that best completes the statement or answers the question. The function f(x) = –x3 – 6x2 – 7 has a critical value at x = 0. Which of the following describes this point?

a.
zero

b.
relative minimum

c.
relative maximum

d.
limit as

Asmall business produces and sells balls. the fixed costs are $20 and each ball costs $4.32 to produce. each ball sells for $8.32. write the equations for the total cost, c, and the revenue, r, then use the graphing method to determine how many balls must be sold to break even.