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allochka39001 [22]
4 years ago
14

Can someone explain/show me how to do this?

Mathematics
1 answer:
grandymaker [24]4 years ago
8 0
V = (-7,-4)

8v would be 8 times both numbers

8v = (8*-7, 8*-4)

8v = (-56, -36)

magnitude = square root( -56^2 + -36^2)
 = sqrt(3136 + 1296)
= sqrt(4432 )
 = 4 sqrt(277)

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Please solve the following question.
insens350 [35]

The confidence interval for the difference p1 - p2 of the population proportion is (0.063, 0.329)

<h3>How to determine the confidence interval?</h3>

The given parameters are:

n₁ = 93; n₂ = 80

p₁ = 0.814;  p₂ = 0.618

The critical value at 95% confidence interval is

z = ±1.96

So, we have:

CI = (p_1 - p_2) \pm z * \sqrt{\frac{p_1(1  - p_1}{n_1} + \frac{p_2(1 - p_2)}{n_2}}

Substitute known values in the above equation

CI = (0.814 - 0.618) \pm 1.96 * \sqrt{\frac{0.814 * (1  - 0.814)}{93} + \frac{0.618 * (1 - 0.618)}{80}}

Evaluate

CI = 0.196 \pm 1.96 * \sqrt{0.001628 + 0.00295095}

This gives

CI = 0.196 ± 0.133

Expand

CI = (0.196 - 0.133, 0.196 + 0.133)

Evaluate

CI = (0.063, 0.329)

Hence, the confidence interval is (0.063, 0.329)

Read more about confidence interval at:

brainly.com/question/15712887

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7 0
2 years ago
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Nadusha1986 [10]

Answer:

Step-by-step explanation:

If a store is having a 20% off sale

By buying an item you save 20% of the price

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$13 = 20% of the price

$65 = 100% of the original price

$65 is your answer!

5 0
3 years ago
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<h3>Answer:  3/6 = 1/2</h3>

Explanation:

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This is one visual way to see how 3/6 = 1/2.

You can multiply top and bottom of 1/2 to get 1*3 = 3 up top and 2*3 = 6 down below.

\frac{1}{2} = \frac{1*3}{2*3} = \frac{3}{6}

8 0
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Answer: i think that is ur own opinion

Step-by-step explanation:

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The answer is 30.

Sorry Last time I found the LCM of the answers.

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