Which set of ordered pairs could be generated by an exponential function?
(-,,1)
(-1,-1), (0, 0), (1, 1), (2, 8)
1-11 - 2), (0, 1), (1, 2), (2, 4)
(-1, 1), (0, 0), (1, 1), (2, 4)

Sound travels about 750 miles per hour. a) suppose it takes about 1.5 seconds to hear the echo. how far away is the canyon wall, in feet? for this i got 825 ft b) suppose you stand 1,925 feet from the canyon wall and sound the horn. how long will it take to hear the echo? (i'm stuck on this)