3 years ago

How do I solve 2/ (sqrt3 -1) ?

Mathematics

1 answer:

nordsb [41]3 years ago

4 0

√3-1

after subtracting one from √3 and dividing two you get √3-1

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Derek had a bill of $29 last month on he Call-a-Lot Plan. How many minutes did he use?

NNADVOKAT [17]

It depends on how much it costed per minute if it was a dollar a minute then it would be 29 minutes

7 0

3 years ago

The standard deviation of a sample taken from population A is 17.6 for a sample of 25.

lawyer [7]

Answer:

The standard deviation of the sample mean differences is _5.23_

Step-by-step explanation:

We have a sample of a population A and a sample of a population B.

For the sample of population A, the standard deviation $\sigma_A$ is

$\sigma_A = 17.6$

The sample size $n_A$ is:

$n_A = 25$ .

For the sample of population B, the standard deviation $\sigma_B$ is

$\sigma_B = 21.2$

The sample size $n_B$ is:

$n_B = 30$ .

Then the standard deviation for the difference of means has the following form:

$\sigma=\sqrt{\frac{\sigma_A^2}{n_A}+\frac{\sigma_B^2}{n_B}}$

Finally

$\sigma=\sqrt{\frac{17.6^2}{25}+\frac{21.2^2}{30}}\\\\\sigma= 5.23$

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4 years ago

5 scholars ran a marthon each one ran 1\5 of a mile how far did the students run in all

IrinaK [193]

9514 1404 393

Answer:

1 mile

Step-by-step explanation:

5 × (1/5 mi) = 5/5 mi = 1 mi

The students ran 1 mile in all.

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3 years ago

5. Five-eighth of a number is 15. What is the number?<br> Your answer

anygoal [31]

Answer:

I think it is 24

Step-by-step explanation:

15÷5=3

3×8=24

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