Chapter 1.1, Problem 89E

Profit. The Financial department for the company in Problems 85 and 87 established the following cost function for producing and selling x million memory chips:

  $C(x)=\text{125}+\text{16}x\text{million}\text{dollars}$

1. (A)   Write a profit function for producing and selling x million memory chips and indicate its domain.
2. (B)   Complete Table 12, computing profits to the nearest million dollars.

Table 12 Profit

x (millions)	P(x) (million $)
1	−69
4
8
12
16
20

1. (C)   Plot the points in part (B) and sketch a graph of the profit function using these points.