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Ilya [14]
2 years ago
14

1 How can + 5 be modeled on a 5 number line? Complete the sentence.

Mathematics
1 answer:
Alexxx [7]2 years ago
5 0

Answer:

-3/5

Step-by-step explanation:

Start at 1/5 then go 4 to the left

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Which undefined geometric term is described as a location on a coordinate plane that is designated by an ordered pair, (x, y)?
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Answer: D.  Point

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Brewed decaffeinated coffee contains some caffeine. We want to estimate the amount of caffeine in 8 ounce cups of decaf coffee a
rusak2 [61]

Answer:

We would have to take a sample of 62 to achieve this result.

Step-by-step explanation:

Confidence level of 95%.

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.

Assume that the standard deviation in the amount of caffeine in 8 ounces of decaf coffee is known to be 2 mg.

This means that \sigma = 2

If we wanted to estimate the true mean amount of caffeine in 8 ounce cups of decaf coffee to within /- 0.5 mg, how large a sample would we have to take to achieve this result?

We would need a sample of n.

n is found when M = 0.5. So

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

0.5 = 1.96\frac{2}{\sqrt{n}}

0.5\sqrt{n} = 2*1.96

Dividing both sides by 0.5

\sqrt{n} = 4*1.96

(\sqrt{n})^2 = (4*1.96)^2

n = 61.5

Rounding up

We would have to take a sample of 62 to achieve this result.

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3 years ago
What is 60- 0.3 answer?
balu736 [363]
Your answer will be 59.7
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THIS IS SO HARD ILL CROWN U BRANLIEST IF U GET IT CORRECT
Leni [432]

Answer:

Its B

Step-by-step explanation:

My classmate told me and I got it right

7 0
2 years ago
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