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2 years ago

A line segment joins points P(-1, -7) and Q (7, 3) Determine the length of PQ to 1 decimal place?

Mathematics

1 answer:

Dmitrij [34]2 years ago

4 0

Answer:

12.8 units

Step-by-step explanation:

PQ=(X2-X1)²+(Y2-Y1)²

=(7-(-1))²+(3-(-7)

=164

then find square root of 164 that gives you 12.8units

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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

Mr. Rijo bought 49 bags of soil one week & 28 bags of soil the next . which expression applies the distributive property to

velikii [3]

The answer is the 48+28=(7)(7)+(14)(2)

3 0

3 years ago

Read 2 more answers

If 10+9=21 than is 1+1= 2?

Andre45 [30]

I guess so, no wait no it’s not jk lol

4 0

3 years ago

Which equation shows function notation for a vertical stretch of factor 2 and shift right 5 units? *

liubo4ka [24]

Answer: I am doing an giveaway for and iphone 11 pro max (black)

Step-by-step explanation: first person who message me gets it be the first

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3 years ago

I Need the answer for these 3

11111nata11111 [884]

Here you go enjoy

Have a good rest of your night

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2 years ago