solve for h = 0.5
-4.9t^2+14t+2.5 = 0.5
now just use the quadratic formula.
URGENT!! PLEASE HELP
In a volleyball match. Jenny serves the volleyball at 14m/s, from a height of 2.5m above the court. The height o the ball in flight can be estimated using the equation h=-4.9t^2+14t+2.5, where h is the height, in meters, and t is the time, in seconds, after she serves the ball.
If a player on the other team contacts the ball at a height of 0.5m above the court, how long does it take for the ball to reach her? Round to the nearest second.
The answer for this question is 3s, but i don't now how to do it!!
I tried replacing 2.5 (in the original relation) with 0.5m, but i got a different answer.
Please help!!! Thanks!
1 answer
1 answer