Final answer:
To find the productivity, divide the number of lawns mowed by the amount of gas used.
Step-by-step explanation:
To find the productivity, we need to divide the number of lawns mowed (75) by the amount of gas used (20 gallons).
Productivity = number of lawns / amount of gas = 75 lawns / 20 gallons = 3.75 lawns/gallon.
Therefore, the productivity you get from the gas is 3.75 lawns per gallon.
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