3 years ago

Don't mind my work but can someone give the answer for 50

Mathematics

2 answers:

Sever21 [200]3 years ago

8 0

The surface area of Micah's ramp is
(12 + 13 + 5 ) * 6 + 2 ( 1/2 * 12 * 5 )
30 * 6 + 60
180 + 60
240 ft

Charra [1.4K]3 years ago

5 0

The answer to question 50 is A. 240 square feet

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Otherwise, you can derive the same result. Let $\theta=\sin^{-1}\dfrac12$ , so that $\sin\theta=\dfrac12$ . $\sin^{-1}$ is bounded, so we know $-\dfrac\pi2\le\theta\le\dfrac\pi2$ . For these values of $\theta$ , we always have $\cos\theta\ge0$ .

So, recalling the Pythagorean theorem, we find

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as expected.

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