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Katarina [22]
3 years ago
10

At which price does quantity demanded equal quantity supplied?

Mathematics
1 answer:
yulyashka [42]3 years ago
3 0

the price of the object

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A file that is 256 megabytes is being downloaded. If the download is 17.3% complete, how many megabytes have been downloaded? Ro
dexar [7]
If i did my math right it should be 44.3
6 0
3 years ago
The lifespan (in days) of the common housefly is best modeled using a normal curve having mean 22 days and standard deviation 5.
Natasha_Volkova [10]

Answer:

Yes, it would be unusual.

Step-by-step explanation:

To solve this question, we need to understand the normal probability distribution and the central limit theorem.

Normal probability distribution

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

If Z \leq -2 or Z \geq 2, the outcome X is considered unusual.

Central Limit Theorem

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

In this question, we have that:

\mu = 22, \sigma = 5, n = 25, s = \frac{5}{\sqrt{25}} = 1

Would it be unusual for this sample mean to be less than 19 days?

We have to find Z when X = 19. So

Z = \frac{X - \mu}{\sigma}

By the Central Limit Theorem

Z = \frac{19 - 22}{1}

Z = -3

Z = -3 \leq -2, so yes, the sample mean being less than 19 days would be considered an unusual outcome.

7 0
2 years ago
Bob had 6 pizzas. He ate 1/5 of the pizzas and served the rest to his friends. How much pizza did his friends have, in decimal f
Studentka2010 [4]
6/1 1/5
6/5
6÷5
0.6 so i hope that help u out
3 0
3 years ago
Nick put 7 1/2 pounds of candy into 6 boxes, the same amount into each. What is the weight of the candy in each box?
zhenek [66]

7 1/2 / 6 = 1.25 pounds

Candy weight in each box = 1 1/4 pounds

6 0
3 years ago
Read 2 more answers
1 + (-2/3) - (9/2) evaluate
Elina [12.6K]

Use the least common denominator(LCD) to solve this equation:

1 + (-2/3) - (9/2)

so, what is the LCM of 3 and 2 : 6

so, the LCD = 6

1 + (-2 x 2/6) - (9 x 3/6)

the 1 = 6/6

Put it back into the equation:

6/6 + (-4/6) - (27/6)

Then, take it out of the parenthesis:

6/6 - 4/6 - 27/6

Simplify:

= - 25/6

which is the answer.

Hope that helped !! Have a great day now

7 0
2 years ago
Read 2 more answers
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