Multiple Choice
Feng is thinking of mowing lawns over the summer.His friend Jason mows lawns,and he says the marginal cost of mowing the fourth lawn in a day is $40.Feng thinks about it and realizes that the total cost of mowing four lawns is:
A) $160.
B) $40.
C) $80.
D) not possible to determine from the information provided.
Correct Answer:

Verified
Correct Answer:
Verified
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