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OleMash [197]
4 years ago
15

Find the third term and the common difference. 1, 4, 7, 10

Mathematics
1 answer:
dusya [7]4 years ago
6 0
Each term is equal the preceding term plus 3. Therefore the next term is 13 and the difference is +3.
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Scores on the math portion of the SAT are believed to be normally distributed and range from 200 to 800. A researcher from the a
Doss [256]

Using the z-distribution, it is found that she should take a sample of 46 students.

<h3>What is a z-distribution confidence interval?</h3>

The confidence interval is:

\overline{x} \pm z\frac{\sigma}{\sqrt{n}}

The margin of error is:

M = z\frac{\sigma}{\sqrt{n}}

In which:

  • \overline{x} is the sample mean.
  • z is the critical value.
  • n is the sample size.
  • \sigma is the standard deviation for the population.

In this problem, we have a 95% confidence level, hence\alpha = 0.95, z is the value of Z that has a p-value of \frac{1+0.95}{2} = 0.975, so the critical value is z = 1.96.

Scores on the math portion of the SAT are believed to be normally distributed and range from 200 to 800, hence, by the Empirical Rule the standard deviation is found as follows:

6\sigma = 800 - 200

6\sigma = 600

\sigma = 100

The sample size is n when M = 29, hence:

M = z\frac{\sigma}{\sqrt{n}}

29 = 1.96\frac{100}{\sqrt{n}}

29\sqrt{n} = 196

\sqrt{n} = \frac{196}{29}

(\sqrt{n})^2 = \left(\frac{196}{29}\right)^2

n = 45.67.

Rounding up, a sample of 46 students should be taken.

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

#SPJ1

4 0
2 years ago
SOMEONE PLEASE HELPPPPPPPPPP
sweet-ann [11.9K]

Answer:

the formula for the volume of a square pyramid is V=a^2*h/3

so if we just put in the data

12^2*10/3

144*10/3

480

so the answer is B

Hope This Helps!!!

7 0
3 years ago
If the ant is 30 feet from the base of the tree, what is the height of the tree, to the nearest tenth
Mrac [35]
I have no clue. How did you get 40 
8 0
3 years ago
If h(x) = 48, find x
babymother [125]

Answer: 0523 i think this the answer i don't know

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Which equation demonstrates the multiplicative identity property?
12345 [234]

Answer:

(-3+5)(1)=-3+5

Step-by-step explanation:

The multiplicative identity is 1.

The multiplicative identity property days that, if you multiply a real number by 1, that result is the same real number.

This is demonstrated in option B of the given alternatives, where we have:

( - 3 + 5)(1) =  - 3 + 5

The multiplication by did not change b the value.

4 0
4 years ago
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