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Elena-2011 [213]
3 years ago
10

American Vending supplies vended food to a large university. Because students often kick the machines out of anger and frustrati

on, management has a constant repair problem. The machines break down in a mean of 3 hours with a standard deviation of 3 hours. One repair worker can service one machine in a mean of 2 hours with a standard deviation of 2 hours. Currently, TWO repair workers are hired. Average flow time (W) was calculated as 2.305 from the posted queueing template. --- Average down machines in the entire system (L) are ___.
Mathematics
1 answer:
Alexxandr [17]3 years ago
3 0

Answer:

0.77

Step-by-step explanation:

From the information given:

The breakdown time (a)= 3 hours

The breakdown rate (λ) = 1/a = 1/3

Average flow time in the system (W) = 2.305 hours

For the entire system;

The average down machines L = Wλ

= 2.305 × (1/3)

= 0.77

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mamaluj [8]
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At the Boston Marathon there were 20,000 runners who finished the race. Each runner ran a distance of 26 miles. If you add toget
andre [41]

Answer:

the runners have gone 20.8 times around the globe all together

Step-by-step explanation:

At the Bostom Marathon, we have a total of

N = 20,000 runners

We know that each runner ran a distance of

d = 26 miles

Therefore, the total distance travelled by all runners combined is:

D=Nd=(20,000)(26)=5.2\cdot 10^5 mi

We know that the circumference of the Earth is

c=2.5\cdot 10^4 mi

Here we want to find how many times around the globe would the marathon runners have gone. This can be found by calculating the following ratio:

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4 0
3 years ago
If DF = 9x -39 find EF
Klio2033 [76]

|DF| = |DE| + |EF|

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|DE| = 47

|EF| = 3x+10

Substitute:

9x - 39 = 47 + 3x + 10

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9x = 3x + 96    |-3x

6x = 96    |:6

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|EF| = (3)(16) + 10 = 48 + 10 = 58

Answer: |EF| = 58

7 0
4 years ago
Read 2 more answers
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Answer:880

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If you want to solve this by using equation the this would look like this:

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Equation:

13200+25x=40x

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3 years ago
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KiRa [710]

Answer:

the answer is b

Step-by-step explanation:


6 0
3 years ago
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