Solve the problem by writing a variation model. The costs of a trucking company vary jointly as the number of trucks in service and the number of hours they are used. When 3 trucks are used for 7 hours each, the costs are $1,533. Find the costs of using 10 trucks, each for 13 hours. $ __________

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The Answer of Solve the problem by writing a variation model. The costs of a trucking company vary jointly as the number of trucks in service and the number of hours they are used. When 3 trucks are used for 7 hours each, the costs are $1,533. Find the costs of using 10 trucks, each for 13 hours. $ __________

Solve the Problem by Writing a Variation Model