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lutik1710 [3]
2 years ago
14

The on-campus Starbucks store sells an average of 4,000 cups of coffee per day. Assuming the store is open 365 days per year and

also assume daily sales to be normally distributed with a standard deviation of 500 cups, how many days in a year will have sales of 3,400 to 4,600 cups of coffee
Mathematics
1 answer:
Flauer [41]2 years ago
5 0

Answer:

1 to 2 years

Step-by-step explanation:

im just trying im sorry if im wrong

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2/3 times 3 times 2/7
fomenos

Answer:

4/7

Step-by-step explanation:

2/7 x 3= 6/7. 6/7× 2/3=4/7

7 0
3 years ago
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Two workers finished a job in 12 days. How long would it take each worker to do the job by himself if one of the workers needs 1
Lorico [155]

Two workers finished a job in 7.5 days.

How long would it take each worker to do the job by himself if one of the workers needs 8 more days to finish the job than the other worker?

let t = time required by one worker to complete the job alone

then

(t+8) = time required by the other worker (shirker)

let the completed job = 1

A typical shared work equation

7.5%2Ft + 7.5%2F%28%28t%2B8%29%29 = 1

multiply by t(t+8), cancel the denominators, and you have

7.5(t+8) + 7.5t = t(t+8)

7.5t + 60 + 7.5t = t^2 + 8t

15t + 60 = t^2 + 8t

form a quadratic equation on the right

0 = t^2 + 8t - 15t - 60

t^2 - 7t - 60 = 0

Factor easily to

(t-12) (t+5) = 0

the positive solution is all we want here

t = 12 days, the first guy working alone

then

the shirker would struggle thru the job in 20 days.

8 0
3 years ago
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Bernie bought a pair of shoes at the store when they were having a 30% off sale. If the
Ne4ueva [31]
It’s $12.60 dollars!!!
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3 years ago
Find each unit rate round to the nearest hundred if necessary 357 miles in 6.3 hours please show work
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3 years ago
Use the interactive number line to find the difference. 4.7 - 2.3 = 4.7 + (-2.3) =
FromTheMoon [43]

Answer:

Arrow from 0 to 4.7 and from 4.7 to 2.4

Step-by-step explanation:

4.7 is also 0+4.7

arrow from 0 to 4.7.

-2.3 from 4.7 is 4.7-2.3=2.4

arrow from 4.7 to 2.4.

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3 years ago
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