A smokejumper jumps from a plane that is 1900 ft above the ground. The function h=-16^2+1900 gives the​ jumper's height h in feet during the free fall at t seconds.
a. How long is the jumper in free fall if the parachute opens at 1000​ ft?
b. How long is the jumper in free fall if the parachute opens at 950 ​ft?
c. What is a reasonable domain and range for the function​ h?


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