Why are you allowed to move the decimal points before dividing with decimals?

Mathematics

1 answer:

nadya68 [22]3 years ago

7 0

It is because both the dividend and the divisor are multiplied by 10, 100, 1000, or some other power of ten.

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23. The diagonal of a rectangle is 17 cm and its perimeter is 46

balandron [24]

Answer:

120 cm

Step-by-step explanation:

Find the solution below.

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4 years ago

3/5 of a number is 30. What is the number? 10 20 es 18 15

S_A_V [24]

Answer:

Step-by-step explanation:

$\frac{3}{5}*x=30\\x=30*5/3=50$

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3 years ago

The standard deviation tells us a. the average value of the scores. b. the relative standing of a particular score. c. the skewn

andreyandreev [35.5K]

We can say that the standard deviation tells us the dispersion of the scores, making option D the correct choice.

<h3>What is the standard deviation?</h3>

A standard deviation (or σ) is a measure of how widely distributed the data is about the mean (μ). A low standard deviation suggests that data is grouped around the mean, whereas a large standard deviation shows that data is more spread out. A standard deviation around 0 suggests that data points are close to the mean, whereas a high or low standard deviation indicates that data points are above or below the mean, respectively.

We use the following formula to compute the standard deviation:

$\sigma = \sqrt\frac{{\sum_{i=1}^{N}\left | x_i - \mu \right | }^2}{N}$

In this formula, σ is the standard deviation, $x_i$ is the data point in the set we are solving for, μ is the mean, and N is the total number of data points.

<h3>How to solve the question?</h3>

In the question, we are asked to tell what standard deviations tell us from the given options.

From the above discussion, we can say that the standard deviation tells us the dispersion of the scores, making option D the correct choice.

Learn more about the standard deviation at

brainly.com/question/475676

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8 0

2 years ago

Read 2 more answers

The population of a small town in central Florida has shown a linear decline in the years 2001-2012. In 2001 the population was

earnstyle [38]

Answer:

Step-by-step explanation:

First of all, to keep our numbers manageable, we are going to let year 2001 = 0 so year 2012 = 11. The coordinates that result from these years/population numbers are (0, 22200) and (11, 13950). Since this linear, we can plug those 2 coordinate pairs into the slope equation to find the rate at which the population is decreasing in people per year:

$m=\frac{13950-22200}{11-0}=\frac{-8250}{11}=-750\frac{people}{year}$ That means that the town is losing people at the rate of 750 per year. We can use that slop along with one of the coordinate points to write the linear equation representing this situation: