9. A 22.5-ounce candle burns at the rate of one ounce every five hours. a) Write an equation to represent the amount of b) How many hours will the candle last?
candle left. Define your variables.

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.