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Textbook Videos [+] If 2000 square centimeters of material is available to make a box with a square base and an open top, find the largest possible volume of the box. Volume = cubic centimeters.

10. A door is 7 feet high and 30 inches wide, with trim of w inches wide on three sides of the door frame. Write the total area (in square inches) of the door and trim in standard form. 11. Certain ceramic tiles are 4 inches by 8 inches and are separated by grout seams that are x inches wide. a. Write a quadratic expression in standard form for the area covered by each tile and its share of the grout. (The grout in each seam is shared by two tiles, so each tile's share is only half the grout in each seam.) b. If the grout seams are inch wide, approximately how many tiles will it take to cover a 5-foot by 10-foot wall? c. What percent of the wall in Part b is grout? D. Focus

Leif knows that the land area of the United States is approximately 9 x 10^6 square kilometers. He is traveling to Norway to visit her grandfather. He knows the land area of Norway is approximately 3 x 10^4 square kilometers. About how many times greater is the land area of the United States than that of NorwayA.3B.30C.300D.3000