13. A small business plans to order carpet for 4 identical offices. The floor of each office is 7.2 feet long and 5.8 feet wide. Part A Round the length and width to the nearest whole number. Then estimate the total amount of carpet that is needed. Write equations to model your work. Part B Find the exact total area. Write equations to model your work. Part C Compare your estimate to the exact answer. Why is your answer reasonable? 16. A forest preserve has an area of 1.6 square miles, and 0.3 of the forest preserve is open for hiking. Part A Shade the grid to model the multiplication. Part B How many square miles are open for hiking? Show your work. Part C How does the model help you to find the product?