Question

Ask Your Teacher The height h in feet reached by a dolphin t seconds after breaking the surface of the water is given by h = −16t2 + 32t. How long will it take the dolphin to jump out of the water and touch the trainer's hand when h = 16?

Answer 1

1 second

Step-by-step explanation:

h = −16t² + 32t

When, h = 16

16 = −16t² + 32t

Divide each of the numbers by 16

1 = -1t² + 2t

Rearrange the equation

1t²-2t+1 = 0

Solving by the quadratic formula, we get

`t=(-(-2)\pm √((-2)^2-4* 1* 1))/(2* 1)\\\Rightarrow t=(2\pm 0)/(2)\\\Rightarrow t=1\ s`

So, time taken by the dolphin to jump out of the water and touch the trainer's hand is 1 second.