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3 years ago

A skate ramp is 4.2 meters long. It rises up 1.7 meters. What’s is the angle of elevation to the nearest tenth of a degree?

1 answer:

4 0

Θ
=
arcsin
(
.7
4.2
)
≈
10
∘
Explanation:
We view the ramp as a right triangle. The hypotenuse is 4.2 and the vertical side .7, which is opposite the angle
θ
we seek.
sin
θ
=
.7
4.2
=
1
6
I'm going to finish the problem but I'll note if we were actually building the ramp we don't need to know the angle; this sine is sufficient.
θ
=
arcsin
(
1
6
)
θ
≈
10
∘
which I think is a pretty steep ramp for a wheelchair.
There will be another inverse sine that is the supplementary angle, around
170
∘
, but we can rule that out as a value for a ramp wedge angle.

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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3 years ago

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Answer: y=3/2x-13/2

Step-by-step explanation:

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3 years ago

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Eduardwww [97]

Answer:

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Step-by-step explanation:

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3 years ago

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jeyben [28]

Answer:

We need a sample of size at least 13.

Step-by-step explanation:

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$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

The margin of error is:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

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$\pi = \frac{0.438 + 0.642}{2} = 0.54$

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$0.08 = 1.96\sqrt{\frac{0.54*0.46}{n}}$