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Mamont248 [21]
3 years ago
12

Experimental/theoretical

Mathematics
2 answers:
Lera25 [3.4K]3 years ago
8 0

Answer:

A.200

Step-by-step explanation:

ale4655 [162]3 years ago
3 0

Answer:

200

Step-by-step explanation:

Ella's name appears on the table 2/10 times, so we can multiply the denominator to make it 1000.

10x100 = 1000

If we multiply the denominator by 100, we must do the same to the numerator,

2x100=200

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A simple random sample is drawn from a normally distributed population. The value of which of the following will not be known fo
Alex777 [14]

The value of NOT s NOR x will not be known for certain but can be inferred. The correct answer between all the choices given is the first choice or letter A. I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.

3 0
4 years ago
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Use the following unit fractions to express 180 miles per hour in feet per second
harina [27]

Answer:

264 ft/sec

Step-by-step explanation:

We need to use the conversion factors

5280 ft/ 1 mi, 60 min/ 1 hr , and 60 sec/1 min

180 miles         1 hour               1 min        5280 ft

----------------- * -----------------  * ------------ * ---------------

hour                60 minutes       60 sec      1 miles

The hours, minutes and miles cancel are we are left with ft/sec

180 *5280        ft

----------------- * -----------------  

60*60                 sec      

264 ft/sec

8 0
3 years ago
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Find the length of the missing side
timurjin [86]

Answer:

40

Step-by-step explanation:

7 0
3 years ago
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Mr. Hartzel had 12 books in his home library. He bought 9 new books at the bookstore, then he sold 6 books. How many books does
Basile [38]

The number of books which Mr. Hartzel has now is:

  • 15 books

<h3>What is Algebra?</h3>

This refers to the use of calculations to solve mathematical problems. There are different ways in which algebra is used and this can include addition, subtraction, division, etc.

With this in mind,  we can see that Mr Hartzel had 12 books in his library

Then he got 9 new books and then sold off 6 books.

Therefore, the total number of books which he has now is:

12+9-6= 15 books

Read more about algebra here:
brainly.com/question/6143254

7 0
3 years ago
The attention span of children (ages 3 to 5) is claimed to be Normally distributed with a mean of 15 minutes and a standard devi
Agata [3.3K]

Answer:

If the observed sample mean is greater than 17.07 minutes, then we would reject the null hypothesis.

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 15 minutes

Sample size, n = 10

Alpha, α = 0.05

Population standard deviation, σ = 4 minutes

First, we design the null and the alternate hypothesis

H_{0}: \mu = 15\text{ minutes}\\H_A: \mu > 15\text{ minutes}

Since the population standard deviation is given, we use one-tailed z test to perform this hypothesis.

Formula:

z_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n}} }

Now, z_{critical} \text{ at 0.05 level of significance for one tail} = 1.64

Thus, we would reject the null hypothesis if the z-statistic is greater than this critical value.

Thus, we can write:

z_{stat} = \displaystyle\frac{\bar{x} - 15}{\frac{4}{\sqrt{10}} } > 1.64\\\\\bar{x} - 15>1.64\times \frac{4}{\sqrt{10}}\\\bar{x} - 15>2.07\\\bar{x} > 15+2.07\\\bar{x} > 17.07

Thus, the decision rule would be if the observed sample mean is greater than 17.07 minutes, then we would reject the null hypothesis.

6 0
4 years ago
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