3 years ago

The sum of two rational numbers is always rational? true or false

Mathematics

1 answer:

Kruka [31]3 years ago

8 0

Answer:

True

Step-by-step explanation:

The sum of numbers always terminate and ends.

You might be interested in

*PLEASE ANSWER FAST*

raketka [301]

Answer:

Step-by-step explanation:

Cross multiplication :)

5 0

3 years ago

Read 2 more answers

Determine the number of significant digits in the measurement <br> 0.79 cm

antiseptic1488 [7]

2 significant digits

5 0

3 years ago

$125,000 is deposited into an account that is compounded quarterly at 5 1/2%. Find the account balance I 17 years.

Ilya [14]

125,000(1+(.055/4))^(17*4)

316379.97246256764

6 0

4 years ago

In order to estimate the mean amount of time computer users spend on the internet each month, how many computer users must be s

Sladkaya [172]

Answer:

The minimum sample size required is 5,499 computer users.

The major obstacle is that it is a big sample size if it is a small organization wanting to perform it.

Step-by-step explanation:

We need to calculate a sample size in order to have 95% confidence interval with 12 minutes of witdth.

So, we have that the difference between the upper limit and the lower limit is 12:

$UL-LL=12$

$(\mu+z*\sigma/\sqrt{n})-(\mu-z*\sigma/\sqrt{n})=12\\\\2z\sigma/\sqrt{n}=12\\\\\sqrt{n}=(1/6)*z\sigma\\\\n=(1/36)z^2\sigma^2$

For a 95% CI, the value of z is 1.96. The standard deviation is 227.

$n=z^2\sigma^2/36=(1.96)^2*(227)^2/36=3.8416*51,529/36=5498.72\\\\n=5499$

The minimum sample size required is 5,499 computer users.

6 0

3 years ago

What is 30% of 1/2 of 20?

notka56 [123]

Answer:

Step-by-step explanation:

8 0

3 years ago