Mr. Specter designed the layout for a factory. The roof of the factory has an elevation of 56.2 feet, and the floor of the lowest level has an elevation of -15.3 feet. A pulley is installed on an outer wall at an approximate elevation equal to of the total height of the factory. The factory office floor is located 5.5 feet above the pulley. What is the approximate elevation of the factory office floor? A. 23.4 feet B. 66 feet C. 25 feet D. 19.6 feet

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

What is the length and width of a 84.5 square foot rug? will mark

An annual marathon covers a route that has a distance of approximately 26 miles. winning times for this marathon are all over 2 hours. the following data are the minutes over 2 hours for the winning male runners over two periods of 20 years each. earlier period 14 12 15 22 13 10 19 13 9 14 20 18 16 20 23 12 18 17 6 13 recent period 7 11 7 14 8 9 11 14 8 7 9 8 7 9 9 9 9 8 10 8 (a) make a stem-and-leaf display for the minutes over 2 hours of the winning times for the earlier period. use two lines per stem. (use the tens digit as the stem and the ones digit as the leaf. enter none in any unused answer blanks. for more details, view how to split a stem.) minutes beyond 2 hours earlier period 0 1 2 (b) make a stem-and-leaf display for the minutes over 2 hours of the winning times for the recent period. use two lines per stem. (use the tens digit as the stem and the ones digit as the leaf. enter none in any unused answer blanks.) minutes beyond 2 hours recent period (c) compare the two distributions. how many times under 15 minutes are in each distribution