Question

The formula c(x) = 0.45 +0.2(x - 1) can be used to find the cost of mailing a letter that

weighs 2 ounces or more. Find the formula for
c'(x)

Answer 1

Explanation:

Remark.

I take it that this is a calculus question question.

Expand c(x)

c(x) = 0.45 + 0.2x - 0.2 Combine

c(x) = 0.25 + 0.2x/dx

c(x) = 0.2