Math 1090
Quiz 5
29 September, 2010
Name:
Instructions: Answer the questions in the spaces provided. Partial credit will
be awarded. Scientific calculators are allowed, but graphing calculators are
not. You must show your work to receive credit!
1. Give the degree and leading coefficient of the following polynomial:
3
−3x4 + x2 − 1
2
2. A certain company produces widgets. Their cost and revenue functions are
C(x) = 80x + 800
R(x) = −x2 + 140x
(a) How many widgets should the company produce to break even? Give all break-even
points.
(b) How many widgets should the company produce in order to maximize profit? What
is the maximum possible profit?