Find the Power of the radical expression below.

An electric company charges $8.50 per month plus 9c for each kilowatt hour (kwh) of electricity used. (a) Find a linear function that gives the total cost (in dollars) of n kwh of electricity. c(n) = 8.50 + 0.09n (b) Find a rational function that gives the average cost (in dollars) per kwh when using n kwh. 8.50 + 0.09n c ( n ) = n (c) Find the average cost per kwh when 825 kwh are used. (Round your answer to the nearest cent.) X +\f