During the 1950s, Seattle was dumping an average of 20 million gallons of sewage into Lake Washington each day.

a.) How much sewage went into Lake Washington in a week? In a year?

b.) In order to illustrate the amounts involved, imagine a rectangular prism whose base is the size of a football field (100 yards x 50 yards) with height h yards. What are the dimensions of such a rectangular prism containing the sewage dumped into Lake Washington in a single day? (Note: There are 7.5 gallons in one cubic foot. Dumping into Lake Washington has stopped; now it goes to Puget Sound.)

Please please explain and show solution please! thank you