Ex 2.10
3) the perimeter of a rectangle is 60m and its length is x m. show that the area of the rectangle is given by the equation a=30x-x². hence find the maximum area of the rectangle

Sara needs to take a taxi to get to the movies the taxi charges $4.00 for the first mile and then $2.75 for each mile after that if the total charge is $20.50 then how far was sara’s taxi ride to the movie