Approximately 4 out of 5 students in mrs.
moynes 7 grade math class have cell
phones. if there are 365 students in the 7th
grade, how many would you expect to have
a cell phone?

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.