The water level in a rectangular swimming pool measuring 60 feet by 20 feet is to be lowered by 6 inches. How many gallons of water must be removed? (1 cu ft = 7.5 gallons)	Select
A) 100  B) 250  C) 4500  D) 1200  E) 5625
6 inches = 1/2 feet (there are 12 inches in a foot.), so  60*20*1/2= 
<gadget id="calculator"> 60*20*1/2</gadget>
<output>600</output>
600 feet^3 of water must be removed, which equals to   600*7.5= 
<gadget id="calculator">  600*7.5</gadget>
<output>4_500</output>
4500 gallons.   Answer: 4500.
<result>C</result>
The water level in a rectangular swimming pool measuring 60 feet by 20 feet is to be lowered by 6 inches. How many gallons of water must be removed? (1 cu ft = 7.5 gallons)