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Ede4ka [16]
2 years ago
13

Help me plsssssssssssss

Mathematics
1 answer:
san4es73 [151]2 years ago
4 0

Answer:

3/1/4

That's the expression represents Lena's speed in miles per hour

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For the first 6% of Carlene's salary, her employer matches 100% of her 401(k) contributions, and from 6% to 12%, Carlene's emplo
Hoochie [10]

Answer:

4000 that is the answer

and i believe

5 0
3 years ago
PLEASE HELP I SUCK AT MATH
natka813 [3]

Answer:

Im pretty sure it's A because Z and AZ are collinear

6 0
2 years ago
ORDER FROM LEAST TO GREATEST FOR BRANLIEST
zimovet [89]

Answer:

First: -0.86

Second: 3\sqrt{2}

Third: \frac{22}{5}

Fourth: 4.49

Step-by-step explanation:

For this, let's <u>convert all the numbers into decimals</u> to easily compare the values.

-0.86

3\sqrt{2}=4.24264 \\\\4.49\\\\\frac{22}{5}= 4.4

5

Now, we order them from least to greatest:

First: -0.86

Second: 3\sqrt{2}

Third: \frac{22}{5}

Fourth: 4.49

Fifth: 5

8 0
1 year ago
The mean annual salary for intermediate level executives is about $74000 per year with a standard deviation of $2500. A random s
lidiya [134]

Answer:

11.51% probability that the mean annual salary of the sample is between $71000 and $73500

Step-by-step explanation:

To solve this question, we need to understand the normal probability distribution and the central limit theorem.

Normal probability distribution

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

Central Limit Theorem

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

In this question, we have that:

\mu = 74000, \sigma = 2500, n = 36, s = \frac{2500}{\sqrt{36}} = 416.67

What is the probability that the mean annual salary of the sample is between $71000 and $73500?

This is the pvalue of Z when X = 73500 subtracted by the pvalue of Z when X = 71000. So

X = 73500

Z = \frac{X - \mu}{\sigma}

By the Central Limit Theorem

Z = \frac{X - \mu}{s}

Z = \frac{73500 - 74000}{416.67}

Z = -1.2

Z = -1.2 has a pvalue of 0.1151

X = 71000

Z = \frac{X - \mu}{s}

Z = \frac{71000 - 74000}{416.67}

Z = -7.2

Z = -7.2 has a pvalue of 0.

0.1151 - 0 = 0.1151

11.51% probability that the mean annual salary of the sample is between $71000 and $73500

8 0
2 years ago
Write the converse of the statement below. If lines are perpendicular, then they intersect at right angles
Viefleur [7K]

<span>Two lines that are always the same distance apart and never touch. this is called your Parallel lines


</span><span>Two lines that do not intersect and are not parallel. this is called your Skew lines
</span>

<span>Parallel planes are found in shapes like cubes, which actually has three sets of parallel planes. this is called your Parallel planes
</span>
<span>If a line segment intersects two straight lines forming two interior angles on the same side that sum to less than two right angles, then the two lines, if extended indefinitely, meet on that side on which the angles sum to less than two right angles. this is called your Parallel postulate</span>

7 0
3 years ago
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