A 10-gallon water cooler in an office provides water for the whole department. Each hour, 30 ounces of water are removed from the cooler and drunk by office workers. Write an equation to show how long the water in the cooler will last. (10 gallons is 1,280 ounces.)

Question

10−30h=0 10 minus 30 h equals 0 30h=10 30 h equals 10 1,280+30h=0 1,280 plus 30 h equals 0 1,280−30h=0

Answer 1

The correct equation to show how long the water in the cooler will last is:

1,280 - 30h = 0