Math problens suck! me, im really bad at math > w

You wanted to draw an enlargement of design that printed on a card that is 4 in by 5

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 solution on the interval [0, 2pi)