All categories

3 years ago

If two expressions have the same factor or base. What happens to the exponents when the expression are dividing

Mathematics

1 answer:

FromTheMoon [43]3 years ago

6 0

Answer:

whats the question tho?

Step-by-step explanation:

You might be interested in

Hhhhhhiiiiiiiiiiiiiiiiiiiiiii

prohojiy [21]

Do you need help? I can assist you if so.

4 0

2 years ago

Y=9x-5 in standard form

Mkey [24]

Y equals nine x minus five I’m sorry I don’t know if I did the right thing but yeah

3 0

3 years ago

What is 3/5 miles and 1/3 hours as a unit rate?

finlep [7]

Answer:

try math-way

Step-by-step explanation:

4 0

3 years ago

You are planning a survey of starting salaries for recent computer science majors. In a recent survey by the National Associatio

nydimaria [60]

Answer:

A sample size of 554 is needed.

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:

$\alpha = \frac{1 - 0.95}{2} = 0.025$

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

That is z with a pvalue of $1 - 0.025 = 0.975$ , so Z = 1.96.

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.

Standard deviation is known to be $12,000

This means that $\sigma = 12000$

What sample size do you need to have a margin of error equal to $1000, with 95% confidence?

This is n for which M = 1000. So

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

$1000 = 1.96\frac{12000}{\sqrt{n}}$

$1000\sqrt{n} = 1.96*12$

Dividing both sides by 1000:

$\sqrt{n} = 1.96*12$

$(\sqrt{n})^2 = (1.96*12)^2$

$n = 553.2$

Rounding up:

A sample size of 554 is needed.

5 0

3 years ago

Complete the equation of the line through (-10,-7) and (-5,–9). Use exact numbers. Y =

Andrew [12]

Y = -2/5x - 11 is the equations

6 0

3 years ago