Abungee jumper falls from a bridge 400 feet above ground. her height above ground after t seconds is given by the equation h=-16t^2+400 where h is the height of the jumper in feet and t is the time in seconds since her jump. approximately how long will it take for the bungee jumper to reach 100 feet above the ground on her initial jump?

a.
14 seconds
b.
4.3 seconds
c.
4.4 seconds
d.
4.5 seconds