Jonathan knit some scarves to sell at a local arts-and-craft show. The function r(x) = 12x models the amount of money, in dollars, he brings in by selling x scarves. The cost for
Jonathan to produce x scarves are $2 each plus $45 to get a booth at the show.
a. Write a function to model the cost, c(x) , Jonathan has to spend.
b. Write a function to model the profit, p(x) , Jonathan will receive from selling x scarves