After a hurricane, repairs to a roof will cost $2700 for materials and $50/hr in labor. Write a model that represents the cost of the repair C (in $) in terms of the number of hours of labor x. The model that represents the cost of repairs is C = ______. Choose one of the following, entering the letter representing your choice in the box below: (a) C = 2700x 50 (b) C = 2700x - 50 (c) C = 50x 2700 (d) C = 50x - 2700 50x 2700 If an estimate for a new roof is $4600, after how many hours of labor would the cost to repair the roof equal the cost of a new roof? It would take ______ hours of labor for the cost of the repair job to equal the cost of a new roof. (Put in ONLY the number)