The average cost for printing x copies of a self-published paperback book with Company A is ()=120+4 c
(
x
)
=
120
+
4
x
x
. The average cost for printing x copies of a paperback book with Company B is ()=25+102
d
(
x
)
=
25
+
10
x
2
x
.

1. Which company would you recommend to an author who wants to print 100 books? Explain your reasoning.

2. Which company would you recommend to an author who thinks their book will be a best seller and needs to print thousands of books? How could you rewrite the equations to make the choice clearer?

Quick! a survey of 57 customers was taken at a bookstore regarding the types of books purchased. the survey found that 33 customers purchased mysteries, 25 purchased science fiction, 18 purchased romance novels, 12 purchased mysteries and science fiction, 9 purchased mysteries and romance novels, 6 purchased science fiction and romance novels, and 2 purchased all three types of books. a) how many of the customers surveyed purchased only mysteries? b) how many purchased mysteries and science fiction, but not romance novels? c) how many purchased mysteries or science fiction? d) how many purchased mysteries or science fiction, but not romance novels? e) how many purchased exactly two types of books?