The number of hours it would take to mow 12 lawns is 7.50 hours.
The first step is take is to determine the unit rate. The unit rate is the total lawns that the lawn service can mow in one hour.
Unit rate = 5 hours / 8 lawns = 0.625 lawns per hour.
The second step is to determine the total time it would take to mow 12 lawns.
Hours it would take to mow 12 lawns = unit rate x number of lawns that can be mowed
0.625 x 12 = 7.50 hours
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