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3 years ago

I need with #10, please?

Mathematics

1 answer:

777dan777 [17]3 years ago

4 0

Answer:

h=7ft

Step-by-step explanation:

sinФ=opposite/hypotenuse

sin45°=5/h

0.71=5/h

multiply via by h

0.71h=(5/h)h

h cancel h it remains 5

0.71h=5

divide through by 0.71

0.71h/0.71=5/0.71

h=7.04ft

h=7ft approximately

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Answer:

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Step-by-step explanation:

step 1

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t ---> the time in seconds

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$h(t)=-16(t^{2}-\frac{25}{16}t+\frac{625}{1,024})+\frac{945}{64}\\h(t)=-16(t^{2}-\frac{25}{16}t+\frac{625}{1,024})+\frac{945}{64}$

Rewrite as perfect squares

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step 2

At about what time did the ball reach the minimum?

we know that

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$0=-16(t-\frac{25}{32})^{2}+\frac{945}{64}$

$16(t-\frac{25}{32})^{2}=\frac{945}{64}$

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$(t-\frac{25}{32})=\pm\frac{\sqrt{945}}{32}$

$t=\pm\frac{\sqrt{945}}{32}+\frac{25}{32}$

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$t=\frac{\sqrt{945}}{32}+\frac{25}{32}=1.74\ sec$

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Step-by-step explanation:

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