A flare is launched from a boat. The height, , in meters, of the flare above the water is approximately modelled by the function

Question

2 years ago

8

A flare is launched from a boat. The height, , in meters, of the flare above the water is approximately modelled by the function

, where is the number of seconds after the flare is launched. How many seconds will it take for the flare to return to the water?

Physics

1 answer:

Tpy6a [65] · Answer 1 · 2022-09-12T20:06:48+03:00

Tpy6a [65]2 years ago

6 0

Answer:

10 seconds

Explanation:

If the height is modeled by the function $h(t)=-15t^{2} +150t$ , then the seconds it takes to reach the water (when the height equals 0) is modeled by the following.

$0=-15t^{2} +150t\\0=-15t*(t-10)\\\\t=0\\t=10$