Priya is stacking building blocks to make a tower. She takes a break when the tower is `2\frac{1}{2}`feet tall, which is `\frac{5}{8}` of the height of the tower she wants to build. How tall is the tower when finished?

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.