A tractor purchased at a cost of is to be depreciated by the double declining-balance method over years. What is the book value of the tractor at the end of years?

What is the relative rate of change of the book value of the tractor at the end of years?

I'm terrible at math any here is appreciated.

If f(x)=2x-6 and g(x)=3x+9, find (f-g)(x)

Amanager recorded the number of bicycles sold by his company each quarter. his projected sales after t years is given by the expression below. which of the following statements best describes the expression? a. the initial sales of 575 bicycles increases at the rate of 4% over 4 quarters. b. the initial sales of 575 bicycles increases at the rate of 18% over 4 years. c. the initial sales of 575 bicycles increases at the rate of 4% over t quarters. d. the initial sales of 575 bicycles increases at the rate of 18% over t years.