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Naily [24]
3 years ago
15

What percent of 630 is 270

Mathematics
1 answer:
Tatiana [17]3 years ago
8 0
I don't Clearly understand your question but I think it is 0.428571
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A poll conducted in 2013 found that 55% of U.S. adult Twitter users get at least some news on Twitter (Pew, 2013). The standard
alina1380 [7]

Answer:

The 99% confidence interval for the fraction of U.S. adult Twitter users who get some news on Twitter is between 49.34% and 60.66%, which means that we are 99% sure that the true percentage of US adult Twitter users who get some news is in this interval.

Step-by-step explanation:

Confidence interval:

A confidence interval has the following format:

M \pm zs

In which M is the sample mean, z is related to the confidence level and s is the standard error.

55% of U.S. adult Twitter users get at least some news on Twitter (Pew, 2013). The standard error for this estimate was 2.2%.

This means that M = 55, s = 2.2

99% confidence level

So \alpha = 0.01, z is the value of Z that has a pvalue of 1 - \frac{0.01}{2} = 0.995, so Z = 2.575.

Lower bound of the interval:

M - zs = 55 - 2.575*2.2 = 49.34

Upper bound:

M + zs = 55 + 2.575*2.2 = 60.66

The 99% confidence interval for the fraction of U.S. adult Twitter users who get some news on Twitter is between 49.34% and 60.66%, which means that we are 99% sure that the true percentage of US adult Twitter users who get some news is in this interval.

6 0
2 years ago
Which is equivalent to the cube root of 8^1/4x?
Triss [41]
Did you have choices?
7 0
2 years ago
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Here's the question. Thank you.
ad-work [718]
18 cm^3
1/2 x 4 x 3 = 6
6 x 3 = 18
4 0
2 years ago
Read 2 more answers
I will mark you brainiest if you can answer this
saul85 [17]

Answer:

B - the graph of the function does not form a straight line

Step-by-step explanation:

linear functions have to form a straight line, and that function in the question is a quadratic because x is to the power of 2.

3 0
2 years ago
Aiko spends 2.5 hours baking croissants for a community center bake sale. She bakes the 90 croissants in 5 batches. Determine th
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5/2.5 is 2. Airó makes 2 batches in an hour.
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