How would you solve 7 3/8 plus 4 1/7

I'm being volume of cylinder with 13 in. radius and 30 in height answer choices in pic

Match each function with its rate of growth or decay

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.