Question

5. Your friend tosses a ball into the air. The equation h = -5ť + 30t +10 models the height,

Answer 1

Answer:

6.3s.

Explanation:

The height h is given by:

$h(t)=-5t^2+30t+10$

Setting the height h = 0 and using the quadratic formula to solve for t:

$0=-5t^2+30t+10\\0=t^2-6t-2\\t_1=3-\sqrt{11}= -0.3s\\t_2=3+\sqrt{11}=6.3s$

t₁ is physicly meaningless.