Acell phone company offers you a plan that charges a flat rate of $25 per month for 200 minutes of airtime. the rate of any time in excess of 200 minutes is $.12 per minute.

a. write an expression for the monthly dollar amount spent for the cell phone service if you want to use x minutes of airtime in excess of 200 minutes.

b. write an equation which indicates that you have budgeted no more than $40 per month to spend on the service.

c. determine the maximum number of minutes you can use in excess of 200 minutes so that you do not exceed your $40 per month budget.