How much does Taryn charge to mow a lawn if he mows 9 lawns spend 7.5 hours mowing and got 112.50?

To find out how much Taryn charges to mow a lawn, we can divide his total earnings by the number of lawns mowed. He earned $112.50 for mowing 9 lawns, so the charge per lawn is $112.50 ÷ 9 = $12.50. Therefore, Taryn charges $12.50 to mow each lawn.