The total monthly cost, f(m) , of Teresa's cell phone plan, in dollars, is calculated using the function (m) = 59.95 + 0.15m , w
here is the number of minutes she uses each month. The total monthly cost, R(n) , of Randy's cell phone plan, in dollars, is calculated using the function R(n) = 29.95 + 0.35n , where n the number of minutes he uses each month. Teresa used 406 minutes last monthRandy used 327 minutes last month. How much less did Teresa owe than Randy?
