Draw the polygon that has vertices at a(-7,-2),b(-4,-4),c(-6,-6) and (-9,-6). find the perimeter or the polygon in the simplest radical form calculator

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.