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Tcecarenko [31]

3 years ago

5

Langston has 45 greeting cards. He gives 18 of the cards to his friend what present of his greeting card he does give to his fri

end

1 answer:

chubhunter [2.5K]3 years ago

3 0

Answer:

it is 8.1

Step-by-step explanation:

Turn the 18 in to a percent first and then divide and it will turn into a decimal sorry im not to good at explaining so basically the answer is 18%

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Eric is studying people's typing habits. He surveyed 525 people and asked whether they leave one space or two spaces after a per

Otrada [13]

Answer: (0.8115, 0.8645)

Step-by-step explanation:

Let p be the proportion of people who leave one space after a period.

Given: Sample size : n= 525

Number of people responded that they leave one space. =440

i.e. sample proportion: $\hat{p}=\dfrac{440}{525}\approx0.838$

z-score for 90% confidence level : 1.645

Formula to find the confidence interval :

$\hat{p}\pm z^*\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}$

$0.838\pm (1.645)\sqrt{\dfrac{0.838(1-0.838)}{525}}\\\\=0.838\pm (1.645)\sqrt{0.00025858285}\\\\=0.838\pm (1.645)(0.01608)\\\\= 0.838\pm0.0265\\\\=(0.838-0.0265,\ 0.838+0.0265)\\\\=(0.8115,\ 0.8645)$

Hence, a 90% confidence interval for the proportion of people who leave one space after a period: (0.8115, 0.8645)

3 0

3 years ago

How are percents greater than 100 used in real world contexts

Paul [167]

Used show you have more than what is needed. Example is you need 6 slices of pizza for all your friends but have 7 slices you have more than is needed.

3 0

3 years ago

The sum of the interior angles of each polygon is 360°. In the diagram, DEFG=SPQR.Find the values of x and y

velikii [3]

Never gonna give you up
Never gonna let you down
Never gonna run around and desert you
Never gonna make you cry
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4 0

3 years ago

Helpppppppp please!!!!!!!!!!!

fenix001 [56]

Answer:

a. (4, 13/6)

b. (4, -5/6)

c. (4, 5/6)

Step-by-step explanation:

sorry if it is not right.

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3 years ago

2 4/5 divided by 2/15

REY [17]

Answer:

21

Step-by-step explanation:

3 0

3 years ago

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