1. A solar lease customer built up an excess of 17,500 kilowatt hours (kwh) during the summer using his solar panels. When he turned his electric heat on, the excess began to be used up at a rate of 75 kilowatt hours per day.
(a)lf E represents the excess left and d represents the number of days since the heat has been turned on, write an equation for E in terms of d.
(b)How much of the excess will be left after two months (use a month length
of 30 days)?