Arandom sample of residents of the county were categorized according to gender (male or female) and whether they supported a proposal to increase the county sales tax rate by one-half percent. the table summarizes the data for the sample.

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.