Problems 17-22 аге аbout a company whose expense rate 2{x) = 6 – x is decreasing.

Please show step by step

Extracted text: Problems 17-22 аге аbout a company whose expense rate 2{x) = 6 – x is decreasing.


Extracted text: 22 What is the area f(x) under the line (x) = 6 - x above the interval fronm x to 6? What is the derivative of this f(x)?