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3 years ago

Pls help with these two math questions

Mathematics

2 answers:

densk [106]3 years ago

7 0

I see it’s math but 1-1= 0

-BARSIC- [3]3 years ago

4 0

Number 18 is D) (3+8m)-7

Number 19 is:

1) z>1

2) z>-1

3) z<1

4) z<-1

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How to solve this it says solve 6!

Dennis_Churaev [7]

Answer:

720

Step-by-step explanation:

6*5*4*3*2*1=720

8 0

3 years ago

What are the zeros of f(x)=x^2-12+36

DochEvi [55]

Answer:

x = 6

Step-by-step explanation:

I think it's supposed to be

y = x² - 12x + 36

Set the equation equal to zero and solve...

0 = x² - 12x + 36

Now factor. What 2 numbers add to -12, and multiply to 36?

-6 and -6, so our factors are

0 = (x - 6)(x - 6)

0 = x - 6, then

6 = x

3 0

3 years ago

A fast food restaurant executive wishes to know how many fast food meals teenagers eat each week. They want to construct a 99% c

Lana71 [14]

Answer:

The minimum sample size required to create the specified confidence interval is 2229.

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.

What is the minimum sample size required to create the specified confidence interval

This is n when $M = 0.06, \sigma = 1.1$

$0.06 = 2.575*\frac{1.1}{\sqrt{n}}$

$0.06\sqrt{n} = 2.575*1.1$

$\sqrt{n} = \frac{2.575*1.1}{0.06}$

$(\sqrt{n})^{2} = (\frac{2.575*1.1}{0.06})^{2}$

$n = 2228.6$

Rounding up

The minimum sample size required to create the specified confidence interval is 2229.

7 0

3 years ago

For which scatterplot is the correlation strongest ?

PtichkaEL [24]

the second one? Step-by-step explanation:

7 0

3 years ago

2350 million in standard form

topjm [15]

Answer:

in this problem we have

2,350 million

Remember that

1 million=1,000,000

2,350 million=2,350*1,000,000=2,350,000,000

convert to standard form

2,350,000,000=2.35*10^{9}

therefore

the answer is

2.35*10^{9}

Step-by-step explanation:

8 0

3 years ago

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