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2 years ago

Twice the sum of 10 and a number is 28. Find the number.

2 answers:

7 0

Short answer: 4

Explanation:
So to do this you have to look at the problem backwards, so 28 divided by 2, 14 - x = 10 If 10 + x = 14 the x = 4

kondor19780726 [428]2 years ago

4 0

Answer:

Explanation:

14 - x = 10 so if 10+x=14 it is 4

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2 years ago

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How many times greater is 70 billion than 700 million

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Students in a statistics class are conducting a survey to estimate the mean number of units students at their college are enroll

Andrew [12]

Using the t-distribution, as we have the standard deviation for the sample, it is found that the 95% confidence interval for the number of units students in their college are enrolled in is (11.7, 12.7).

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

The confidence interval is:

$\overline{x} \pm t\frac{s}{\sqrt{n}}$

In which:

$\overline{x}$ is the sample mean.

t is the critical value.

n is the sample size.

s is the standard deviation for the sample.

The critical value, using a t-distribution calculator, for a two-tailed <em>95% confidence interval</em>, with 49 - 1 = <em>48 df</em>, is t = 2.0106.

Hence:

$\overline{x} - t\frac{s}{\sqrt{n}} = 12.2 - 2.0106\frac{1.6}{\sqrt{49}} = 11.7$

$\overline{x} + t\frac{s}{\sqrt{n}} = 12.2 + 2.0106\frac{1.6}{\sqrt{49}} = 12.7$

The 95% confidence interval for the number of units students in their college are enrolled in is (11.7, 12.7).

More can be learned about the t-distribution at brainly.com/question/16162795

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2 years ago

What does Sancho want to drink? una diet coke a chocolate shake water

HACTEHA [7]

Answer: Water.

Explanation: He wants to choose water because it is the most healthiest out of them. First off a chocolate shake is high on sugar, and may lead to changes in your blood vessels, and red blood cells. A diet coke has artificial sweeteners, including aspartame. So your best answer is water.

Hope this helps!

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A group of friends wants to go to the amusement park. They have no more than $110 to spend on parking and admission. Parking is

gavmur [86]

Answer:

Explanation:

Let p be the number of persons
16.5 + 11p ≤ 110
The maximum number is 8.5 and as a person you cannot be half so its 8

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2 years ago