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2 years ago

At the beginning of 2012 Jacobs savings account had 675.20

Mathematics

1 answer:

OLEGan [10]2 years ago

7 0

Thanks for the update but uh... Is there a question? If you could comment the options on my reply that would be great.

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A political candidate has asked you to conduct a poll to determine what percentage of people support him. If the candidate only

Nadusha1986 [10]

Answer:

The sample size required is, n = 502.

Step-by-step explanation:

The (1 - α)% confidence interval for population proportion is:

$CI=\hat p\pm z_{\alpha/2}\sqrt{\frac{\hat p\cdot (1-\hat p)}{n}}$

The margin of error is:

$MOE=z_{\alpha/2}\sqrt{\frac{\hat p\ \cdot (1-\hat p)}{n}}$

Assume that 50% of the people would support this political candidate.

The margin of error is, MOE = 0.05.

The critical value of z for 97.5% confidence level is:

z = 2.24

Compute the sample size as follows:

$MOE=z_{\alpha/2}\sqrt{\frac{\hat p\ \cdot (1-\hat p)}{n}}$

$n=[\frac{z_{\alpha/2}\times \sqrt{\hat p(1-\hat p)}}{MOE}]^{2}$

$=[\frac{2.24\times \sqrt{0.50(1-0.50)}}{0.05}]^{2}\\\\=501.76\\\\\approx 502$

Thus, the sample size required is, n = 502.

4 0

2 years ago

Solve the equation 3x=5(x+3)-3

netineya [11]

3x = 5(x + 3) - 3 |use distributive property: a(b + c) = ab + ac

3x = 5x + 15 - 3

3x = 5x + 12 |subtract 5x from both sides

-2x = 12 |divide both sides by (-2)

x = -6

4 0

2 years ago

What is the distributive property?

Bumek [7]

Answer:

2(x + y) = 2x + 2y

Hope this helped and brainliest please

8 0

1 year ago

Read 2 more answers

A cylinder with height,h, and radius,r, has a volume of 1200pi cubic units. What could be the dimensions of this cylinder?

Aleks04 [339]

Answer:

h = 12 units, r = 10 units

Step-by-step explanation:

$v=\pi (10)^{2} (12)=\pi (100)(12)=1200\pi$

Hope this helps

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1 year ago

the company delivered 1 3/5 tons of bricks to one building site. they delivered 2 1/2 times this much to a second site. what was

Sergio [31]

2 11/10....................

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2 years ago