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earnstyle [38]
3 years ago
6

Quiz: Characteristics of Quadratics

Mathematics
1 answer:
kondaur [170]3 years ago
5 0

Answer:

2

Step-by-step explanation:

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2/3 as a real number
BaLLatris [955]

Answer:

Yes

Step-by-step explanation:

I don't know the question but 2/3 is a real number.

8 0
3 years ago
You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable estimate for the
Vesna [10]

Answer:

A sample size of at least 1,353,733 is required.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of , and a confidence level of , we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of .

The margin of error is:

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

98% confidence level

So \alpha = 0.02, z is the value of Z that has a pvalue of 1 - \frac{0.02}{2} = 0.99, so Z = 2.327.  

You would like to be 98% confident that you esimate is within 0.1% of the true population proportion. How large of a sample size is required?

We need a sample size of at least n.

n is found when M = 0.001.

Since we don't have an estimate for the proportion, we use the worst case scenario, that is \pi = 0.5

So

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

0.001 = 2.327\sqrt{\frac{0.5*0.5}{n}}

0.001\sqrt{n} = 2.327*0.5

\sqrt{n} = \frac{2.327*0.5}{0.001}

(\sqrt{n})^{2} = (\frac{2.327*0.5}{0.001})^{2}

n = 1353732.25

Rounding up

A sample size of at least 1,353,733 is required.

5 0
3 years ago
PLEASE ANSWER I REALLY NEED HELP ON THIS TEST
marshall27 [118]

Answer:

A

Step-by-step explanation:

beacause if you try to multiple 4x7.5 divided by 2 try it

6 0
2 years ago
How is multiplying and dividing numbers in scientific notation different from adding and subtracting numbers in scientific notat
lianna [129]

Answer:

  1. add or subtract
  2. multiply or divide

Hope this helps!

4 0
2 years ago
A bouquet of lilies and tulips has 20 flowers.
motikmotik

Answer:8 lilies and 12 tulips; total of 20 flowers.

Step-by-step explanation:

8 lilies for $3 each equals $24. 12 tulips for $2 each equals $24. Add that together and the total for the bouquet is $48.

4 0
3 years ago
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