3 years ago

What is the length of arc BD? A. 5.23 in. B. 20.6 in. C. 120 in D. 10.47

Mathematics

2 answers:

Gre4nikov [31]3 years ago

5 0

Your answer is d
.............................

s2008m [1.1K]3 years ago

5 0

Good day \\\\\\\\\\\\\\\

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Answer:

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(b) s² = 12

Step-by-step explanation:

(a) Population variance σ² = ∑(X - $\overline{X}$ )² / N

The arithmetic mean $\overline{X} = \frac{8 + 17 + 29 + 35 + 41}{5}$

$\overline{X} = \frac{130}{5}$

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σ² = $\frac{(8 - 26)^{2} + (17 - 26)^{2} + (29 - 26)^{2} + (35 - 26)^{2} + (41 - 26)^{2}}{5}$

= $\frac{(- 18)^{2} + (- 9)^{2} + (3)^{2} + (9)^{2} + (15)^{2}}{5}$

= $\frac{324\ +\ 81\ +\ 9\ +\ 81\ +\ 225}{5}$

= $\frac{720}{4}$

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Answer:

Step-by-step explanation:

++ = +

+- = -

-+ = -

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