A dolphin jumped up out of the water and back into the water in a parabolic path. (H) height (t) seconds . H=-8(t-0.5)^2+2 . How long will the dolphin be in the air?

4 seconds

Step-by-step explanation:

using the vertex formula of a quadratic,

, where (h,k) is the vertex

   h is height and t is time in seconds

the vertex (maximum height) of the dolphin is (h,k) or (0.5, 2)  

Height of 1/2

time of 2 seconds

it will take 2 additional seconds to reach the water again.

this can also be solved using quadratic equation, but since it was already set up in vertex form, i'd use that.

the answer is c: divide the arc's degree measure by 360°, then multiply by the circumference of the circle.

there are no choices to this, can you give us some choices so that i can answer it

step-by-step explanation: