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Dimas [21]
3 years ago
14

The time it takes to travel to a destination varies inversely with the average speed. It takes two hours when the average speed

is 40mph. If the average speed changes to 80mph, what is the new travel time?
Mathematics
2 answers:
Ilya [14]3 years ago
8 0

Answer:

<u>By inverse proportionality</u>,

40/2 = 80/x

40x = 160

x = 160/40

x = 4

<u>So, new travel time is 4 hour</u>.

777dan777 [17]3 years ago
7 0

4hour.

<h3>Justification:</h3>

<u>We are given time takes to travel is inversely with an average speed</u>.

  • When average speed is 40mph, it takes 2hour.

Then,

<u>If average speed is 80mph, let time taken be x</u>:

  • 40/2 = 80/x
  • 40x = 160
  • x = 160/40
  • x = 4

<u>Hence, it takes 4 hour to travel to a destination with 80mph</u>.

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The answer to this question
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Answer:

4m

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6 0
4 years ago
A simple random sample of size n=10 is obtained from a population that is normally distributed with a mean of 40 and a standard
Eva8 [605]

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A sampling distribution is a chance distribution of a statistic obtained from a larger variety of samples drawn from a specific populace. The sampling distribution of a given population is the distribution of frequencies of a variety of various outcomes that would probable occur for a statistic of a populace.

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Solution :

mean = μ40

standard deviation σ σ= 3

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μx =  40

σ x = σ√n =  3/√10  = 0.9487

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Learn more about sampling distribution here:- brainly.com/question/12892403

#SPJ4

3 0
2 years ago
Shaan’s math homework scores for the semester are 90, 85, 98, 60, 84, and 78. Shaan’s teacher said she would drop the lowest hom
Tatiana [17]

Answer:

The final mean is higher

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The mean of all the scores = \frac{90  + 85 + 98 + 60 + 84 + 78}{6\\} = \frac{495}{6} = 82.5\\

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That will always happen when you drop the lowest score.  I worked it out for you so that you would see that it happened in your case.

8 0
3 years ago
Read 2 more answers
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