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Pepsi [2]
4 years ago
13

Determine the unit rates represented by 1. Zephra ran 2 miles in 0.25 hour.

Mathematics
1 answer:
Harlamova29_29 [7]4 years ago
7 0

The unit rate represents 2 miles in 0.25 hour is 8 miles per hour

Step-by-step explanation:

Let us revise the meaning of rate and unit rate

1. A rate is a ratio that is used to compare different types of quantities

2. A unit rate shows how many units of the first type of quantity

   corresponds to one unit of the second type of quantity

Examples:

Cost per item

Distance per hour

∵ Zephra ran 2 miles in 0.25 hour

- To find the unit rate make the denominator of the ratio = 1

∵ The unit rate = \frac{2}{0.25}

- Divide up and down by 0.25

∵ 2 ÷ 0.25 = 8

∵ 0.25 ÷ 0.25 = 1

∴ The unit rate = \frac{8}{1}

∴ The unit rate = 8 miles per hour

The unit rate represents 2 miles in 0.25 hour is 8 miles per hour

Learn more:

You can learn more about rate in brainly.com/question/9533500

brainly.com/question/317616

#LearnwithBrainly

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Convert 746% to a mixed number
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Answer: 373/50

Step-by-step explanation:

Step 1: convert to a fraction

746% = 746 ÷ 100 = 7.46

7.46 = 373/50

Step 2: Write the number as a fraction of one: 7.46 = 746/100

Step 3: use a common divisor of 2 to reduce the numbers, we have

(746÷2)= 373

(100÷2)=50

when reduced to the simplest form= 373/50

Therefore, 746/ 100 = 373/50 when expressed as a mixed number.

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The sum of 3, 5, and a number is 15. Why is the value of that number?
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3 years ago
Kirsten runs an experiment for her Research Methods class in which she studies vocabulary learning in introductory-level French
Sidana [21]

Answer:

Kristen should use the paired <em>t</em>-test.

Step-by-step explanation:

The dependent t-test (also known as the paired t-test or paired-samples t-test) compares the two means associated groups to conclude if there is a statistically significant difference between these two means.

We use the paired t-test if we have two measurements on the same item, person or thing. We should also use this test if we have two items that are being measured with a unique condition.

For instance, an experimenter tests the effect of a medicine on a group of patients before and after giving the doses.

In this case, Kristen assesses the students' knowledge of French vocabulary at the start of the semester and then again at the end of the semester.

So, she collects data before and after the semester for vocabulary learning in introductory-level French class.

Thus, she is using a paired <em>t</em>-test to analyze whether the French students significantly increased their knowledge of French vocabulary.

The hypothesis is defined as:

<em>H₀</em>: There is no difference between the two means, i.e. <em>μ</em>₁ - <em>μ</em>₂ = 0.

<em>Hₐ</em>: There is a significant difference between the two means, i.e. <em>μ</em>₁ - <em>μ</em>₂ ≠ 0.

The test statistic is:

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Thus, Kristen should use the paired <em>t</em>-test.

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3 years ago
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Answer:

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Step-by-step explanation:

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