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4 years ago

Estimate the quotient of 72.1÷7

Mathematics

2 answers:

Valentin [98]4 years ago

8 0

72.1 is very close to 70, so you can round 72.1 to 70 when you estimate your answer. 70/7=10

Your answer is around 10

Vilka [71]4 years ago

5 0

The answer is 10.3. Please give me Brainliest

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Line k is parallel to y= -2x - 1 and passes through the point (4,3). What is the y intercept of line k?

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2 years ago

Out of every 1000 packages received by a merchant, three are damaged. In a day, the merchant received 600 damaged packages. How

lukranit [14]

Answer:

1.8 undamaged packages

Step-by-step explanation:

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3 years ago

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)

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3 years ago

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Answer:

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