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otez555 [7]
3 years ago
9

The Boardman family walked 2/5 of a mile in 2/7 of an hour. What is their unit rate in miles per hour? 20 points

Mathematics
1 answer:
Ad libitum [116K]3 years ago
8 0
Unit rate = (2/5) / (2/7)
unit rate = 2/5 x 7/2
unit rate =  7/5
unit rate = 1.4 

answer
1.4 miles per hour
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3 years ago
The distribution of the average amount of sleep per night gotten by college students is roughly bell-shaped with mean 412 minute
kirza4 [7]

Answer:

P(X

P(z

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Solution to the problem

Let X the random variable that represent the scores of a population, and for this case we know the distribution for X is given by:

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We are interested on this probability

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And the best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{x-\mu}{\sigma}

If we apply this formula to our probability we got this:

P(X

And we can find this probability using the normal standard table or excel and we got:

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3 years ago
Math! Answer to 1&2?
Jobisdone [24]

Answer:

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Step-by-step explanation:

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5 0
3 years ago
What is the answer to 26=t-19
natali 33 [55]
<h3>YOUR QUERY :</h3>

what is the answer to 26=t-19 ?

Answer:

t = 45, okay

Step-by-step explanation:

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8 0
3 years ago
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Llana [10]

Answer

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Step-by-step explanation:

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and the other factor, the 146 , just stays inside of the radical sign.

8 0
3 years ago
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