15. A rectangular building lot has a width of 75.0 ft and a length of 125 ft. Determine the area of this lot in square meters. 24. 16. Suppose your hair grows at the rate 1/32 in. per day. Find the rate at which it grows in nanometers per second. Because the distance between atoms in a molecule is on the order of 0.1 nm, your answer suggests how rapidly lay- 25. ers of atoms are assembled in this protein synthesis. 17. Why is the following situation impossible? A student's dormi- tory room measures 3.8 m by 3.6 m, and its ceiling is 2.5 m 26. high. After the student completes his physics course, he displays his dedication by completely wallpapering the walls of the room with the pages from his copy of volume 1 (Chapters 1-22) of this textbook. He even covers the door and window. 18. A pyramid has a height of 481 ft, and its base covers an area of 13.0 acres (Fig. P1.18). The volume of a pyramid is given by the expression V = 3 Bh, where B is the area of SECT the base and h is the height. Find the volume of this pyra- mid in cubic meters. (1 acre = 43 560 ft?) 27. Adam Sylvester/Photo Researchers, Inc. 28. Figure P1.18 Problems 18 and 19