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9966 [12]
3 years ago
14

A grocery store buys a pound of coffee for $5.40 and uses a mark-up rate of 25%. Find the selling price.

Mathematics
2 answers:
yanalaym [24]3 years ago
7 0

Answer:

noah

Step-by-step explanation:

nexus9112 [7]3 years ago
5 0

Answer:

Step-by-step explanation:

(1+25/100)5.40

(1.25)5.40

$6.75

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Construct a 99​% confidence interval to estimate the population proportion with a sample proportion equal to 0.36 and a sample s
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Using the z-distribution, the 99​% confidence interval to estimate the population proportion is: (0.2364, 0.4836).

<h3>What is a confidence interval of proportions?</h3>

A confidence interval of proportions is given by:

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which:

  • \pi is the sample proportion.
  • z is the critical value.
  • n is the sample size.

In this problem, we have a 99% confidence level, hence\alpha = 0.99, z is the value of Z that has a p-value of \frac{1+0.99}{2} = 0.995, so the critical value is z = 2.575.

The estimate and the sample size are given by:

\pi = 0.36, n = 100.

Then the bounds of the interval are:

  • \pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.36 - 2.575\sqrt{\frac{0.36(0.64)}{100}} = 0.2364
  • \pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.36 + 2.575\sqrt{\frac{0.36(0.64)}{100}} = 0.4836

The 99​% confidence interval to estimate the population proportion is: (0.2364, 0.4836).

More can be learned about the z-distribution at brainly.com/question/25890103

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8 0
2 years ago
In a large school district, for every one male teacher, there are three female teachers. Four teachers are selected at random to
serg [7]

Answer:

It would be a female teacher 3 out of 4 times, and male 1 out of 4. You could make a circle, divide it into quarters, make a spinner and likely get male once of four times.

6 0
3 years ago
Mike pays $285 in rent every week.<br> How much will he pay in rent for the entire year?
sergejj [24]

Answer:

14,820

Step-by-step explanation:

A year has 52 weeks. 285 x 52 = 14820

6 0
2 years ago
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Find the slope of the line that passes through the points  (0, -3) and (-4, 1).
gayaneshka [121]
Find slope by calculating rise (change in y) over run (change in x).

1-(-3)/-4-0
4/-4
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Final answer: A
5 0
3 years ago
Find 2(−5)(−6)−(−12)
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Answer:

72

Step-by-step explanation:

2*-5=-10

-10*-6=60

60-(-12)=60+12=72

3 0
3 years ago
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