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3 years ago

Which equation represents the proportional relationship in the tabel.

Mathematics

1 answer:

cestrela7 [59]3 years ago

4 0

Answer: C=8.5t

Step-by-step explanation:

If you were to divide the total cost (c) by the Time (t) for any of the numbers you would get 8.5.

Hope this helps

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Assoli18 [71]

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3 years ago

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cestrela7 [59]

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2 years ago

The mean per capita income is 15,451 dollars per annum with a variance of 298,116. What is the probability that the sample mean

docker41 [41]

Answer: 0.5467

Step-by-step explanation:

Let X be the random variable that represents the income (in dollars) of a randomly selected person.

Given : $\mu=15451$

$\sigma^2=298116\\\\\Rightarrow\ \sigma=\sqrt{298116}=546$

Sample size : n=350

z-score : $\dfrac{x-\mu}{\dfrac{\sigma}{\sqrt{n}}}$

To find the probability that the sample mean would differ from the true mean by less than 22 dollars, the interval will be

$\mu-22,\ \mu+22\\\\=15,451 -22,\ 15,451 +22\\\\=15429,\ 15473$

For x=15429

$z=\dfrac{15429-15451}{\dfrac{546}{\sqrt{350}}}\approx-0.75$

For x=15473

$z=\dfrac{15473-15451}{\dfrac{546}{\sqrt{350}}}\approx0.75$

The required probability :-

$P(15429$

Hence, the required probability is 0.5467.

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3 years ago

Bob was driving home at an average speed of 40mph for 2 hours. How fast should he drive for the next 1 hour to have an average s

Aleks04 [339]

Answer:

He will need to drive 70 mph for the next hour for his average to be 50pmh.

Hope this helped :)

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3 years ago