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3 years ago

Find the length of an arc made by an 80° central angle in a circle with a 10 ft. radius.

Mathematics

2 answers:

docker41 [41]3 years ago

4 0

I'm not an expert at this but the answer should be 13.9 or 14

valentina_108 [34]3 years ago

4 0

Answer:

6.9778

Step-by-step explanation:

we use

theta/360 × 2pier

I.e,

theta=80

r=10

80/360 × 2× 3.14 ×10

62.8/9

6.9778

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3 years ago

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By definition of variance, we have

$\mathrm{Var}[L]=E\left[(L-E[L])^2\right]=E[L^2]-E[L]^2$

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$\displaystyle\sum_{\alpha\in\{w,x,y,z\}}p_\alpha{\ell_\alpha}^2=\dfrac12+\dfrac{2^2}4+\dfrac{2\cdot3^2}8=\dfrac{15}4$

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2 years ago