1-2. Joe surveyed 119 students at his school. In the survey, he asked students what type of pet
they had: dog, cat, both, or neither. The information is in the following Venn diagram.
Dog
Cat
45
21
?

17

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.