The cost in dollars to produce x shovels in a factory is given by the function C(x)=12x+450. The number of shovels that can be produced in h hours is given by the function N(h)=40h. 1. Find the rule for C(N(h)).

2. Find the rule for when h=8 hours.

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answer: -10

step-by-step explanation:

s(t) = 1 - 10t

s(x) = 1 - 10x

s(x + h) = 1 - 10(x + h)

            = 1 - 10x - 10h

s(x + h) - s(x) = 1 - 10x - 10h - (1 - 10x)

                      = 1 - 10x - 10h - 1 + 10x

                      = -10h

= -10