Multiple Choice
Suppose that a highway is governed by a use fee charged to motorists that is based on congestion, operation and maintenance. The total traffic t is used to determine the cost of 5t² + 7t. What is the marginal cost?
A) 12
B) 5t + 7
C) 10
D) 10t + 7
Correct Answer:

Verified
Correct Answer:
Verified
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