The pool contains 600 gallons of water before the hose is turned on, and water flows from the hose into the pool at a rate of 8 gallons per minute. Thus, the number of gallons of water in the pool m minutes after the hose is turned on is given by the expression 600+8m. Therefore, after 70 minutes, there will be 600+8(70)=1160 gallons of water in the pool