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arsen [322]
3 years ago
9

What is the result when 212 is increased by 28%?

Mathematics
2 answers:
vazorg [7]3 years ago
6 0
<span>59.36 is the correct answer</span>
zhenek [66]3 years ago
5 0

212 + 28% = <span>271.36</span>

<span>Hope it helps! :D</span>

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Give two ways to write each algebraic expression in words. 4+×
KATRIN_1 [288]

Answer:

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The mean annual income for people in a certain city is 37 thousand dollars, with a standard deviation of 28 thousand dollars. A
Aloiza [94]

Answer:

P( 31 < \bar X< 41)

And we can ue the z score formula given by:

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

And using this formula we got for the limits:

z = \frac{31-37}{\frac{28}{\sqrt{50}}}= -1.515

z = \frac{41-37}{\frac{28}{\sqrt{50}}}= 1.01

So we want to find this probability:

P(-1.515

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Solution to the problem

Let X the random variable that represent the annual income of a population, and for this case we know the following info:

\mu=37 and \sigma=28  and we are omitting the zeros from the thousand to simplify calculations

We select a sample size of n=50>30.

The central limit theorem states that "if we have a population with mean μ and standard deviation σ and take sufficiently large random samples from the population with replacement, then the distribution of the sample means will be approximately normally distributed. This will hold true regardless of whether the source population is normal or skewed, provided the sample size is sufficiently large".

From the central limit theorem we know that the distribution for the sample mean \bar X is given by:

\bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}})

And we want to find this probability:

P( 31 < \bar X< 41)

And we can ue the z score formula given by:

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

And using this formula we got for the limits:

z = \frac{31-37}{\frac{28}{\sqrt{50}}}= -1.515

z = \frac{41-37}{\frac{28}{\sqrt{50}}}= 1.01

So we want to find this probability:

P(-1.515

4 0
3 years ago
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lawyer [7]

Answer:

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Step-by-step explanation:

A polynomial is a expression with more than one terms.

The expression with negative exponent is not a polynomial.

Expression in the denominator is also not a polynomial

x^2-1 has two terms without any negative exponent. so it is a polynomial.

option B,C and D has negative exponents, so it is not a polynomial.

7 0
3 years ago
PLEASE HELPPP!!!! :(
Svetach [21]

Answer:

i think its c

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
The RATIO of corresponding sides of two similar polygons is called the _________ _____________.
pentagon [3]

Answer:

If two polygons are similar, then the ratio of the lengths of any two corresponding sides is called the scale factor. This means that the ratio of all parts of a polygon is the same as the ratio of the sides.

Step-by-step explanation:

SCALE FACTOR

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3 years ago
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