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vichka [17]
4 years ago
6

Please! I need an answer to this fast! Will give 39 points!!!!

Mathematics
2 answers:
EastWind [94]4 years ago
7 0

Answer:


Step-by-step explanation: You haven't provided enough information for anyone to answer, try including the answer choices or pictures if possible.


andrew-mc [135]4 years ago
4 0

If it is this question:

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Graphing Absolute Value Functions &amp; Inequalities<br> f (x) = |3x-4|
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absolute value makes everything positive instead of negative so since you didn't even really ask a question I'm just going to solve the problem without a point

f(x)=3x+4

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\The graph for the equation y = negative x + 2 is shown below. On a coordinate plane, a line with positive slope goes through (0
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Can someone please help
RoseWind [281]
it’s 9 sq feet
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Anna has fabric that is 1/4 yard long. She needs to cut the fabric into pieces that are 1/8 yard long. How many 1/8 yard long pi
Damm [24]

Answer:

2

Step-by-step explanation:

1/4= .25

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8 0
4 years ago
Suppose the germination periods, in days, for grass seed are normally distributed. If the population standard deviation is 3 day
KatRina [158]

Answer:

The minimum sample size is needed to be 90% confident that the sample mean is within 1 day of the true population mean is 25.

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{1-0.9}{2} = 0.05

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 1-0.05 = 0.95, so z = 1.645

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.

If the population standard deviation is 3 days, what minimum sample size is needed to be 90% confident that the sample mean is within 1 day of the true population mean?

This is n when \sigma = 3, M = 1. So

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

1 = 1.645*\frac{3}{\sqrt{n}}

\sqrt{n} = 3*1.645

(\sqrt{n})^{2} = (3*1.645)^{2}

n = 24.3

Rouding up to the nearest integer, 25.

The minimum sample size is needed to be 90% confident that the sample mean is within 1 day of the true population mean is 25.

4 0
3 years ago
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