SOLUTION: Tyrone built a model rocket for his science project. The equation h= -16t2+260t models the flight of the rocket, launched from ground level at a velocity of 260 feet per second, w

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: Tyrone built a model rocket for his science project. The equation h= -16t2+260t models the flight of the rocket, launched from ground level at a velocity of 260 feet per second, w      Log On


   

Question 1156020: Tyrone built a model rocket for his science project. The equation h= -16t2+260t models the flight of the rocket, launched from ground level at a velocity of 260 feet per second, where h is the height of the rocket in feet after t seconds. How long does it take the rocket to hit the ground?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
When the rocket hits the ground, +h+=+0+
+h+=+-16t%5E2+%2B+260t+
+-16t%5E2+%2B+260t+=+0+
+t%2A%28+-16t+%2B+260+%29+=+0+
+t+=+0+ is the solution for when the rocket was launched
The other solution is for when it comes back to earth
+-16t+%2B+260+=+0+
+16t+=+260+
+t+=+16.25+
It will take 16.25 sec to hit the ground