First divide the rocks per 3/4 of an hour by 3 and multiply by 4 to get the production per hour. then subtract the already moved rocks from the total job and divide the answer by 16 (the rocks moved per hour) getting the time needed to move the rest
Lilyworks for a florist. She worked 20hours last week and earned $200.00. At that rate, how much will she earn if she works for
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