Tanner went to Academy to buy a new pair of Nike shoes. He noticed that the price of the shoes he wanted dropped from $70 to now only $45. Approximately what is the percent decrease in the price of the shoes?

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.