A diver dives from a 10 m springboard. The equation f(t)=−4.9t2+4t+10 models her height above the pool at time t in seconds. At what time does she enter the water?

Question

asked Apr 20, 2021 169k views

1 Answer

Zhengkenghong · Answer 1 · 2021-04-25T06:35:27+0000

Answer:

0.8163265306

Explanation

here f(t) is distance which is 10m.

so

10= -4.9t²+4t+10

then solve this

-4.9t²+4t=0

-4.9t+4=0

4.9t=4

t=4÷4.9

time is 0.8163265306 seconds