Cost After t hours of operation, an assembly line has assembled A(t) = 20t −power lawn mow...

Cost After t hours of operation, an assembly line has assembled A(t) = 20t −power lawn mowers, 0 ≤ t ≤ 10. Suppose that the factory’s cost of manufacturing x units is C(x) dollars, where C(x) = 3000 + 80x.

(a) Express the factory’s cost as a (composite)function of the number of hours of operation of the assembly line.

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(b) What is the cost of the first 2 hours of operation?