HELP ASAP FOR 100 POINTS

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.

Find the missing dimension extra points

If x-1 and x+3 are the factors of x3+10x2+ax+b find a and b