The cost of parking in a boat dock can be calculated by the following expression:?

The cost of parking in a boat dock can be calculated by the following expression:
C = 3 + 2.2(t-1) Where C = cost in dollars and t = the time in hours. How much does it cost to pull into the dock for 5 hours?

A. 10

B. 7.3

C. 12.8

D. 11.8

answers are greatly appreciated!
 
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