Arectangular chair cushion measures 14 inches long 12 inches wide and 3 inches high how many square inches of fabric would you need to cover the cushion.

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)