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Identify BR rounded to the nearest tenth. HELP PLEASE!!
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Identify BR rounded to the nearest tenth. HELP PLEASE!!

Identify BR rounded to the nearest tenth. HELP PLEASE!!-example-1
User Lyly
by
6.3k points

1 Answer

7 votes

Answer:

BR ≈ 49.0

Explanation:

Use cosine:


cosine=(adjacent)/(hypotenuse)

We have


adjacent=42\\hypotenuse=BR\\\alpha=31^o


\cos31^o\approx0.8572

Substitute:


(42)/(BR)=0.8572


(42)/(BR)=(8,572)/(10,000) cross multiply


8,572BR=420,000 divide both sides by 8,572


BR=(420,000)/(8,572)


BR\approx49.0

User Roman C
by
6.2k points
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