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3 years ago

Choose the fraction that is equal to:

Mathematics

2 answers:

PtichkaEL [24]3 years ago

6 0

I believe that 49/200 is the answer

Nataly_w [17]3 years ago

3 0

Answer:

49/200

Step-by-step explanation:

Step 1 - Write 0.245 over 1000 (since there are 3 zeros in this decimal, there are also 3 zeros in 1000):

0.245 = 245/1000

Step 2 - Simplify the fraction 245/1000 to its lowest terms:

245/1000 = 43/200

Therefore 49/200 is the correct answer :)

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For each store, what is the ratio of the number of cans to the price.

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3 years ago

A random sample of 200 people was taken. 90 of the people in the sample favored Candidate A. We are interested in determining wh

mafiozo [28]

Answer:

a. 1.44

Step-by-step explanation:

We are interested in determining whether or not the proportion of the population in favor of Candidate A is significantly more than 40%.

At the null hypothesis, it is tested if the proportion is of at most 40%, that is:

$H_0: p \leq 0.4$

At the alternative hypothesis, it is tested if the proportion is of more than 40%, that is:

$H_1: p > 0.4$

The test statistic is:

$z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}$

In which X is the sample mean, $\mu$ is the value tested at the null hypothesis, $\sigma$ is the standard deviation and n is the size of the sample.

0.4 is tested at the null hypothesis:

This means that $p = 0.4, \sigma = \sqrt{0.4*0.6}$

A random sample of 200 people was taken. 90 of the people in the sample favored Candidate A.

This means that:

$n = 200, X = \frac{90}{200} = 0.45$

Value of the test statistic:

$z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}$

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3 years ago

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Katen [24]

Answer:

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Step-by-step explanation:

To compare Elanor's and Gerald's math scores, we need to standardize them and calculate their z-scores.

z score can be calculated using the formula

z= $\frac{X-M}{s}$ where

X is the student's score

M is the mean score of the exam

s is the standard deviation of the exam

Elanor's standardized score is:

z(e) = $\frac{680-554}{106}$ ≈ 1.19

Gerald's standardized score is:

z(g)= $\frac{27-24.7}{3.2}$ ≈ 0.72

Since z(e) > z(g), Elanor has higher score

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kherson [118]

Answer:

Step-by-step explanation: 2^2z

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