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kenny6666 [7]
3 years ago
7

Can someone give me a step by step answer on how they figured this out so I understand it PLEASE???

Mathematics
1 answer:
Dimas [21]3 years ago
6 0

Answer:

25 mph

Step-by-step explanation:

The slope of the line gives the rate of change (speed) of the train

From the graph note that after 6 hours the distance travelled is 150 miles

Thus slope = \frac{150}{6} = 25

The train is travelling at 25 mph

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If the distribution is really N ( 5.43 , 0.54 ) , N(5.43,0.54), what proportion of observations would be less than 5.05 ? 5.05?
Ipatiy [6.2K]

Answer:

P(X

And we can use the following excel code to find the answer: "=NORM.DIST(-0.704,0,1,TRUE)"

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 of interest for a population, and for this case we know the distribution for X is given by:

X \sim N(5.43,0.54)  

Where \mu=5.43 and \sigma=0.54

We are interested on this probability

P(X

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 on this way:

P(Z

And we can use the following excel code to find the answer: "=NORM.DIST(-0.704,0,1,TRUE)"

6 0
3 years ago
Please do help I'm very confused
andreyandreev [35.5K]

Answer: 1,760 centimeters

Step-by-step explanation: Your Answer is above

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Your school is organizing a carnival. You are building a ramp for a game. The surface of the ramp will be 8 feet long with a tot
saw5 [17]

Answer:

The answer is sin-1(5/8)

Step-by-step explanation:

I don't have a calculator but just plug that in in degree mode.

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Answer: hi thanks for the five

Step-by-step explanation:

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Rose Betty and Cindy equally shared five boxes of crayons write an equation to show how much each girl got??
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5 divided by 3 is .6. I hope this makes sense. Good luck. I apologize if this is wrong
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3 years ago
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