What is the difference between division and multiplication

Divide the following fractions 3/4 ÷ 2/3 1/2 8/9 9/8 2

Sum is 17 and their difference is 3

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.