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Leviafan [203]
3 years ago
11

A campus deli serves 250 customers over its busy lunch period from 11:30 a.m. to 1:30 p.m. A quick count of the number of custom

ers waiting in line and being served by the sandwich makers shows that an average of 9 customers are in process at any point in time. What is the average amount of time that a customer spends in process
Mathematics
1 answer:
hammer [34]3 years ago
4 0
2 mins brief douxv six
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A boat traveled in a river upstream for a distance of 30 miles at a constant rate, r, in miles per hour, and then made the retur
ICE Princess25 [194]

Answer:

D

Step-by-step explanation:

r = boat's rate

c = current's rate

1. A boat traveled in a river upstream for a distance of 30 miles. Travelling upstream, the current obstructs the movement, so the actual boat's rate is r - c mph.

If the boat took 4 hours to travel upstream, then

\dfrac{30}{r-c}=4\\ \\4(r-c)=30\\ \\4r-4c=30

2. A boat traveled in a river downstream for a distance of 30 miles. Travelling downstream, the current helps the movement, so the actual boat's rate is r + c mph.

If the boat took 3 hours to travel downstream, then

\dfrac{30}{r+c}=3\\ \\30=3(r+c)\\ \\3r+3c=30

So, we get the system

4r-4c=30

3r+3c=30

8 0
4 years ago
Divide 132 kg in a ratio of 3:3:5?
Serga [27]
Add the ratios together and divide them by 132. then times the number by the answer you get.

3+3+5=11

132÷11=12

12×3=36

12×3=36

12×5=60

so: 36:36:60
4 0
3 years ago
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Definition: This is the process of cell reproduction where cell splits into two daughter cells. Example: Mitosis
jasenka [17]
I’m pretty sure that means meiosis
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Mark draws a card 50 times from a standard deck of 52 cards and gets a Heart 8 times. What is the experimental probability that
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<span>Experimental probability is defined as the ratio of the number of times an event occurs to the total number of trials the activity is performed

In this case the number that the event occurred is 8 and the number of trials is 50, so the ratio is 8/50 = 4/25.

Then the answer is option B: 4/25
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Find the value of y in the equation 3/y-2=8
Marina86 [1]
<span>3
---  </span>-2 = 8<span>
y

</span>3
---  = 8+2
y

3
---  = 10
y
3
       
         3
y = ------
        10
4 0
3 years ago
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