Car Sharing Yaster Car Sharing offers a membership plan with a $43 per month fee that includes 13 hours of driving each month and charges $9 for each additional hour. Let F(a:) be the cost for a month in which a member uses a car for 2: hours. Then F(a:) is the piecewise function 0 F(z:) = 43,for0 _<_ a: s f mm b for> 13 for some scalars m and b. Find b. Round to the nearest whole number