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Viefleur [7K]
3 years ago
15

Question 2

Mathematics
1 answer:
DENIUS [597]3 years ago
8 0

9514 1404 393

Answer:

  1.05

Step-by-step explanation:

Following instructions, we have ...

  Z = (X -μ)/σ

  Z = (180 -159)/20 = 21/20

  Z = 1.05

The Z-score associated with the value 3 minutes is 1.05.

_____

<em>Additional comment</em>

About 14.7% of customers will be getting free coffee.

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Step-by-step explanation:

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Type that into the ol' handy dandy calculator and we've got 0.1388888889. So... a lot of 8's, we don't need that many and we just can't have an answer with that many.

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