A football player kicks a ball with an intitial velocity of 47 feet per second. The initial height of the ball is 4 feet. The function h(t)=−16t2+47t+4 models the height (in feet) of the ball, when t is the time in seconds.

Exits on an interstate are numbered consecutively. the distance between exit 12 and exit 13 is 2.7 miles. the distance between exit 13 and exit 14 is 0.9 mile farther than the distance between exit 12 and exit 13. the distance between exit 13 and exit 15 is 6.8 miles farther than the distance between exit 12 and exit 14. the distance between exit 14 and exit 15 is miles.