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Brut [27]
3 years ago
12

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

Physics
1 answer:
Naily [24]3 years ago
4 0

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.

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