Chapter 1.1, Problem 58E

The time needed to install computer cables has a linear relationship with the number of feet of cable being installed. It takes 112 hours to install 300 feet, and 1050 feet can be installed in 4 hours. Find the equation for the relationship. Let y be the feet of cable installed and x be the time in hours. Write the equation in slope-intercept form.

Sound Location Listening station A and listening station B are located at 3300,0 and 3300,0, respectively. Station A detects an explosion 4 seconds before station B. (Assume the coordinate system is measured in feet and sound travels at 1100 feet per second.) (a) Where did the explosion occur? (b) Station C is located at 3300,1100 and detects the explosion 1 second after station A. Find the coordinates of the explosion.