Question 763472
Jasmine is a competitive diver.
 In a dive off an 8m platform, she reaches a maximum height of 8.4m
 after 0.30 seconds.
 How long does it take her to reach the water?
:
The question is how long does it take to fall 8.4 meters
The water is 0, therefore:
-4.9t^2 + 8.4  = 0
-4.9t^2 = -8.4
t^2 = {{{(-8.4)/(-4.9)}}}
t^2 = +1.71
t = {{{sqrt(1.71)}}}
t = 1.3 seconds which is 1.6 seconds after she leaves the board