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Jlenok [28]
3 years ago
15

The formula for converting temperature from Fahrenheit (f) to celsius (c) is c= 5/4(f-32). if the temperature is 77 Fahrenheit,

what is it in celsius?
a) 60 5/9 degrees c
B) 45 degrees c
c) 41 2/3 degrees c
D) 25 degrees c
Mathematics
2 answers:
spin [16.1K]3 years ago
6 0

Answer:

the answer is D) 25 degrees c

stepan [7]3 years ago
6 0

Answer: D) 25 degrees c

Step-by-step explanation:

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m= y2- y1 / x2 - x1= Slope

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What two numbers multiply to be 12 and add to be -11?
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Answer:

-12 and 1

Step-by-step explanation:

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6 0
4 years ago
The dwarves of the Grey Mountains wish to conduct a survey of their pick-axes in order to construct a 99% confidence interval ab
Dmitry_Shevchenko [17]

Answer:

The minimum sample size needed is 125.

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}}

For this problem, we have that:

\pi = 0.25

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.

What minimum sample size would be necessary in order ensure a margin of error of 10 percentage points (or less) if they use the prior estimate that 25 percent of the pick-axes are in need of repair?

This minimum sample size is n.

n is found when M = 0.1

So

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

0.1 = 2.575\sqrt{\frac{0.25*0.75}{n}}

0.1\sqrt{n} = 2.575{0.25*0.75}

\sqrt{n} = \frac{2.575{0.25*0.75}}{0.1}

(\sqrt{n})^{2} = (\frac{2.575{0.25*0.75}}{0.1})^{2}

n = 124.32

Rounding up

The minimum sample size needed is 125.

5 0
4 years ago
(answer ASAP! thanks.) "As part of a math project, Joel recorded the types of vehicles passing an intersection in one hour. His
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Step-by-step explanation:

There is a total amount of vehicle of 100

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7 0
3 years ago
Calculate the average rate of change of f(x) = x2 4 - 5 for 3 ≤ x ≤ 5.
pogonyaev

Answer:

8

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Substitute the equation and values into the average rate of change formula.

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