antonio And his dad are building a bookcase. each Board they're using is 7 1/2 feet long if they want shelves to be 1 1/2 feet long how many shelves can be cut from the board

(2,20) means that the 2 is 2 hours and 20 is 20$. so there both 20$ for 2 hours only the same price. like it says. so, the dunk tank and the bounce house are the same price (20$) for the same amount of time (2 hours).

hope i

sorry not knowing about that