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3 years ago

Use the formula F = 9/5c + 32 to convert -3 degrees Celsius to degrees Fahrenheit

1 answer:

6 0

$\text{Put c = -3 to the equation}\ F=\dfrac{9}{5}c+32.\\\\F=\dfrac{9}{5}(-3)+32=-\dfrac{27}{5}+32=-5.4+32=26.6\\\\Answer:\ \boxed{-3^oC=26.6^oF}$

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The scores on a Psychology exam were normally distributed with a mean of 67 and a standard deviation of 8. Create a normal distr

Trava [24]

Answer:

(a) The percentage of the scores were less than 59% is 16%.

(b) The percentage of the scores were over 83% is 2%.

Step-by-step explanation:

Let the random variable X represent the scores on a Psychology exam.

The random variable X follows a Normal distribution with mean, μ = 67 and standard deviation, σ = 8.

Assume that the maximum score is 100.

(a)

Compute the probability of the scores that were less than 59% as follows:

$P(X$

$=P(Z$

*Use a z-table.

Thus, the percentage of the scores were less than 59% is 16%.

(b)

Compute the probability of the scores that were over 83% as follows:

$P(X>83)=P(\frac{X-\mu}{\sigma}>\frac{83-67}{8})$

$=P(Z>2)\\\\=1-P(Z$

*Use a z-table.

Thus, the percentage of the scores were over 83% is 2%.

(c)

It is provided n = 160 students took the exam.

Compute the probability of the scores that were over 75% as follows:

$P(X>75)=P(\frac{X-\mu}{\sigma}>\frac{75-67}{8})$

$=P(Z>1)\\\\=1-P(Z$

The percentage of students who received a score over 75% is 16%.

Compute the number of students who received a score over 75% as follows:

$\text{Number of Students}=0.16\times 160=25.6\approx 26$

Thus, the number of students who received a score over 75% is 26.

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4 years ago

How do you get 66% off of a total? For example like a tax % 7.5?

Margarita [4]

To get the 66 percent of a total, you just divide the percentage by 100 then multiply it to the tax percentage which you have be also divided by 100. I hope you are satisfied with my answer and feel free to ask for if you have questions and clarifications

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3 years ago

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MrRa [10]

Millimeter is the smallest and blood cells are really small. I’d say something smaller though, if that’s an option.

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3 years ago

Read 2 more answers

What is f(x) + f(x) + f(x)? Please help

Talja [164]

Answer:

3f(x)

Step-by-step explanation:

I mean there's three added together so its 3 times f(x)

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3 years ago

Rick and Tom rented party halls. The Celebrations party hall charged Rick a rental fee of $65, including music, and $25 per gues

Ksivusya [100]

Answer:

C. The same number of guests attended Rick and Tom's party.

Step-by-step explanation:

Let R and T represent the number of guests at Rick's and Tom's parties, respectively. The charges Rick and Tom paid are equal, so we have ...

65 +25R = 40+25+25T

25R = 25T . . . . . . . . . . . . subtract 65

R = T . . . . . . . . . . . . . . . . . divide by 25

The number of guests at each party is the same.

6 0

4 years ago