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Elden [556K]
3 years ago
11

If f(x) = -x2+2x f(6)

Mathematics
1 answer:
Mariana [72]3 years ago
5 0

Answer:

0

Step-by-step explanation:

f(6)= -6×2+2×6

f(6)= -12+12 = 0

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Lisa paid something that cost $420 and they gave her 40%.How much did she pay?​
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Answer:252

Step-by-step explanation:420x60/100

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3 years ago
Out of  {(-3, -2), (-3, 0), (-1, 2), (1, 2)} what numbers are domains​
Kaylis [27]
Domain is X
Range is Y
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3 years ago
The number of undergraduates at Johns Hopkins University is approximately 2000, while the number at Ohio State University is app
dem82 [27]

Answer:

The answer is "Option C"

Step-by-step explanation:

please find the complete question in the attached file:

Its ratio of samples by Johns Hopkins will be about the equivalent than those from Ohio State because sample varying depending on the sample, each of them would have the same variability also like the amount, that's why he assumes the variance of sample sizing in the sample percentage p with both the hat above, relative to the confidence interval in Ohio State determined from its Johns Hopkins test.

6 0
3 years ago
Help please Inequality
Alinara [238K]

Answer:

D I think most likely

Step-by-step explanation:

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8 0
3 years ago
In 2009 a survey of Internet usage found that 79 percent of adults age 18 years and older in the United States use the Internet.
Alex777 [14]

Answer:

0.025 = 2.33\sqrt{\frac{0.79*0.21}{n}}

Option d.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, 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 1 - \frac{\alpha}{2}.

The margin of error is:

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

79 percent of adults age 18 years and older in the United States use the Internet.

This means that \pi = 0.79

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 = 2.33.

Which of the following should be used to find the sample size (n) needed?

We have to find n for which M = 0.025

So the equation is:

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

0.025 = 2.33\sqrt{\frac{0.79*0.21}{n}}

Option d.

4 0
3 years ago
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