The graph shows the profit P (in thousands of dollars) of a company in terms of its advertising cost x (in thousands of dollars). (Round your answers
to the nearest whole number.)
4000
3500
3000
2500
Profit of a Company
In
Profit (in thousands of dollars)
2000
1500
1000
500
I
10 20 30
40
50 60 70
Advertising cost (in thousands of dollars)
(a) Estimate the interval on which the profit is increasing. (Enter your answer using interval notation.)
(0,40)
(b) Estimate the interval on which the profit is decreasing. (Enter your answer using interval notation.)
(40,60)
c) Estimate the amount of money the company should spend (in dollars) on advertising in order to yield a maximum profit.
$ 40000
d) Estimate the point of diminishing returns.
(x, P) =
=
500,