Please help me with this question!

15 and 14.7 are 1 apart, so 15 – 14.7 must be 1.

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.

How to simply and write the answer n a whole number