Physics: When glaciers melt, they leave ridges of rock, gravel, sand, and clay called

Explanation:Given a quadratic equation in its standard form:It s roots can be found using the quadratic formula, given by:That s what we need to do in this problem, because we need to know for what values of t h(t)=0:In this case:So:We are not interested in the first solution t=0 because it is the time before the golf ball is hit from the ground. The answer we look is the second solution t=4.Therefore, it takes 4 seconds to return to the ground....

When glaciers melt, they leave ridges of rock,

Ответ:

cynthiafchs9203

04.04.2022

Physics

t=4s

Explanation:

Given a quadratic equation in its standard form:

ax^2+bx+c=0

It's roots can be found using the quadratic formula, given by:

$x=\frac{-b\pm \sqrt{b^2-4ac} }{2a}$

That's what we need to do in this problem, because we need to know for what values of t h(t)=0:

h(t)=-16t^2+64t=0

In this case:

$a=-16\\b=64\\c=0$

So:

$t=\frac{-64\pm \sqrt{64^2-(4*(-16)*0} }{-16*2} = \frac{-64\pm \sqrt{64^2-0} }{-32}=\frac{-64\pm 64}{-32} \\\\Hence\\\\t=\frac{-64+64}{-32}=\frac{0}{-32} =0\\\\or\\\\t=\frac{-64-64}{-32} =\frac{-128}{-32} =4$

We are not interested in the first solution t=0 because it is the time before the golf ball is hit from the ground. The answer we look is the second solution t=4.

Therefore, it takes 4 seconds to return to the ground.

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When glaciers melt, they leave ridges of rock, gravel, sand, and clay called

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