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3 years ago

12

Which of the following is not a real number?

2 answers:

givi [52]3 years ago

7 0

Answer:

im pretty sure its the -3 one

Step-by-step explanation:

FinnZ [79.3K]3 years ago

7 0

Answer:

The answer is A, Square root of -3 is not a real number.

Step-by-step explanation: You can take the square root of positive numbers, so we can eliminate choices C and D. We can take the square root of 0, which would equal 0, so B is incorrect. However, We cannot take the square root of negative numbers, so choice A is the answer for this question.

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kramer

Answer:

<h2><em><u>9</u></em></h2>

Step-by-step explanation :

$\sqrt{ \frac{243}{3} }$

$= \sqrt{81}$

$= \sqrt{9 \times 9}$

= <em><u>9(Ans)</u></em>

5 0

3 years ago

Read 2 more answers

The points A, B, and C lie on a line so that AB = 12 cm and BC = 13.5 cm. Find the length of segment AC. Give all possible answe

natita [175]

Answer:

25.5 and 1.5

Step-by-step explanation:

AC = 12 cm

BC = 13.5 cm

12 + 13.5 = 25.5 cm

13.5 - 12 = 1.5 cm

4 0

3 years ago

Type the correct answer in the box. Write your answer to one decimal place. A boy who is 1. 8 meters tall stands 1 meter away fr

alisha [4.7K]

1.5 meters tall the lampost

5 0

2 years ago

Marquise sold shirts to raise money for school.

Rashid [163]

The shirts were sold at $15 each.

5 0

3 years ago

A sample size of n = 64 is drawn from a population whose standard deviation is o = 5.6.

AlekseyPX

Answer:

The margin of error for a 99% confidence interval for the population mean is 1.8025.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.99}{2} = 0.005$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.005 = 0.995$ , so $z = 2.575$

Now, find the margin of error M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

In this problem:

$\sigma = 5.6$

So

$M = 2.575*\frac{5.6}{\sqrt{64}} = 1.8025$

The margin of error for a 99% confidence interval for the population mean is 1.8025.

5 0

3 years ago