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Y_Kistochka [10]
2 years ago
5

What is 21.6 rounded to the nearest whole number

Mathematics
2 answers:
miv72 [106K]2 years ago
7 0

Answer:

22

Step-by-step explanation:

21.6 would round up because 6 is closer to 10 than it is 0

Vinvika [58]2 years ago
7 0

Answer:

22

Step-by-step explanation:

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Scores of an IQ test have a bell-shaped distribution with a mean of 100 and a standard deviation of 12. Use the empirical rule t
MissTica

Answer:

A) 99.7% of people have an IQ between 64 and 136.

B) 5% of people have an IQ score less than 76 or greater than 124.

C) 16% of people have an IQ score greater than 112.

Step-by-step explanation:

The Empirical Rule tells us that, in a normal or 'bell-shaped' distribution, 68% of the data is one standard deviation from the mean, 95% of the data is two standard deviations from the mean, and 99.7% of the data is three standard deviations from the mean.

A) 64 and 136 are 3 standard deviations away from the mean, so 99.7% of people have an IQ between 64 and 136.

B) 76 and 124 are 2 standard devations away from the mean, but the answer is asking what percentage is not between them. 100% - 95% gives us 5%.

C) 112 is one standard deviation away from the mean. If we want to find the percentage greater, then we can do 100% - 50% (as 112 is to the left of the mean), then we can take half of 68 to get 34%, and after subtracting 50% and 34% from the 100%, we get 16%.

8 0
3 years ago
Show why x−3 is a factor of m(x)=x3−x2−5x−3. Justify your answer. You can show this using remainder theorem, long division, synt
Marat540 [252]

The factors of a polynomial function are the zeros of the function

It is true that x - 3 is a factor of m(x) = x^3 - x^2 - 5x - 3

<h3>How to show why the x - 3 is a factor</h3>

The function is given as:

m(x) = x^3 - x^2 - 5x - 3

The factor is given as:

x - 3

Set the factor to 0

x - 3 = 0

Solve for x

x = 3

Substitute 3 for x in the function

m(3) = 3^3 - 3^2 - 5(3) - 3

Evaluate

m(3) =0

Since the value of m(3) is 0, then x - 3 is a factor of m(x) = x^3 - x^2 - 5x - 3

Read more about factors at:

brainly.com/question/11579257

7 0
2 years ago
Please help me out if possible!
oksano4ka [1.4K]

Answer:

<h2><u>111°</u></h2>

Step-by-step explanation:

Hi,

So lets answer this question;

Here we know that:

69° + z = 180° [Straight angle or Supplementary angle]

⇒ z = 180° - 69°

      = <u>111°</u>

3 0
3 years ago
Construct an equation using the given information
elena-s [515]

Answer:

So, equation using the given information :

5 is subtracted from a number the result is the same as the number tripled will be: x-5=3x

Step-by-step explanation:

We need to make an equation of: 5 is subtracted from a number the result is the same as the number tripled.

Let, the number be x

5 is subtracted from a number will be: x-5

The number tripled will be: 3*x

The required equation will be:

x-5=3x

So, equation using the given information :

5 is subtracted from a number the result is the same as the number tripled will be: x-5=3x

3 0
3 years ago
At the toy store, 3 toy cars cost $2.61. How much does it cost to buy 15 toy cars?
Masteriza [31]
Use a ratio \frac{3}{2.61}= \frac{15}{x} . 13.05 dollars.
7 0
3 years ago
Read 2 more answers
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