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2 years ago

If Seth traveled 1 mile in 57.1 seconds. About how fast does Seth travel in miles per second?

Mathematics

1 answer:

andreyandreev [35.5K]2 years ago

3 0

Answer:

0.0175 is correct answer. Please Mark it as brainlist answer.

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Jonah wants to construct a confidence interval using 90% confidence to estimate what proportion of silicon wafers at his factory

Nimfa-mama [501]

Answer:

170

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 of:

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

Assume:

$\pi = 0.06$

90% confidence level

So $\alpha = 0.1$ , z is the value of Z that has a pvalue of $1 - \frac{0.1}{2} = 0.95$ , so $Z = 1.645$ .

What is the smallest sample size required to obtain the desired margin of error?

This is n for which M = 0.03. So

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

$0.03 = 1.645\sqrt{\frac{0.06*0.94}{n}}$

$0.03\sqrt{n} = 1.645\sqrt{0.06*0.94}$

$\sqrt{n} = \frac{1.645\sqrt{0.06*0.94}}{0.03}$

$(\sqrt{n})^2 = (\frac{1.645\sqrt{0.06*0.94}}{0.03})^2$

$n = 169.6$

Rounding up, 170.

4 0

3 years ago

If 5 plus 10 equals 21 then minus 1 equivalent to 3 = what?

Bogdan [553]

Is this a joke? I think it’s 6

3 0

3 years ago

Read 2 more answers

Find the center of a circle whose end points of a diameter are A (-5,6) and B (3,4)

victus00 [196]

<u>Answer:</u>

(-1, 5)

<u>Step-by-step explanation:</u>

The center of a circle is the midpoint of the diameter.

So we have to calculate the midpoint of the diameter, using this formula:

midpoint = ( $\frac{x_{2 }+x_{1} }{2}$ , $\frac{y_{2} + y_{1} }{2}$ )

= ( $\frac{3 + (-5)}{2}$ , $\frac{4 + 6}{2}$ )

= (-1, 5)

∴ The center of the circle lies at the point (-1, 5).

7 0

2 years ago

There are 35 boys in the sixth grade. The number of girls in the sixth grade is 42. Lonnie says that means the ratio of number o

lubasha [3.4K]

Answer:

Lonnie is not correct

Step-by-step explanation:

4 0

3 years ago

The cost price of a wrist watch of 2500 at 25% gain what’s the selling price

Lyrx [107]

Answer:

The selling price is $3,125

Step-by-step explanation:

25% of 2500 is 2500 x 0.25 = 625

You will be adding the 25% gain to cost price to find the new price

2500 + 625 = 3125

7 0

2 years ago

Read 2 more answers