Use the following information to answer questions 28-30.
Jason will have a rectangular concrete patio constructed beside his house, as shown below. The patio will have a length of 18 feet, and the top surface of the patio will have an area of 270 square feet. The patio will be constructed so that one side of the patio is against a side of Jason’s house.
29. Jason chooses Tully’s Concrete Finishing to seal his patio. Tully’s Concrete Finishing uses the formula C = 3.5A + 120 to calculate the charge, C dollars, to seal a patio, where A square feet is the area of the top surface of the patio. What will be the charge for sealing Jason’s patio?