Help .. this is college math,... its TOO HARD

What aspects of lines have to be diffrent

Divide. reduce the answer to lowest terms.5 2/3 ÷ 3 1/9

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.