Robert is replacing sod into square shaped areas of his backyard. one side of the first area is 7.5 ft. one side of the other area is 5.7 ft. the sod cost y dollars per square foot. a. write an expression to show how much robert will spend on sod. b. what is the sob cost $3.25 per square foot, about how much will roberts pan to put srd down in both areas of his backyard? round to the nearest dollar.