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Natasha2012 [34]
3 years ago
9

While shopping , lucinda

Mathematics
1 answer:
Novay_Z [31]3 years ago
8 0
She originally had $320 in her savings. 48 times 100= 4,800. 4,800 divided by 15=320.
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The 2nd option is correct
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What is the equation of the line that is parallel to the given line and passes through the point (-3, 2)?
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The times to process orders at the service counter of a pharmacy are exponentially distributed with mean 1 0 minutes. If 100 cus
g100num [7]

Answer:

Therefore,  the probability that at least half of them need to wait more than 10 minutes is <em>0.0031</em>.

Step-by-step explanation:

The formula for the probability of an exponential distribution is:

P(x < b) = 1 - e^(b/3)

Using the complement rule, we can determine the probability of a customer having to wait more than 10 minutes, by:

p = P(x > 10)

  = 1 - P(x < 10)

  = 1 - (1 - e^(-10/10) )

  = e⁻¹

  = 0.3679

The z-score is the difference in sample size and the population mean, divided by the standard deviation:

z = (p' - p) / √[p(1 - p) / n]

  = (0.5 - 0.3679) / √[0.3679(1 - 0.3679) / 100)]

  = 2.7393

Therefore, using the probability table, you find that the corresponding probability is:

P(p' ≥ 0.5) = P(z > 2.7393)

<em>P(p' ≥ 0.5) = 0.0031</em>

<em></em>

Therefore,  the probability that at least half of them need to wait more than 10 minutes is <em>0.0031</em>.

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3 years ago
Which of the following is not a property of mathematical proofs?
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How do the areas of the parallelogram compare?
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The first choice is right, area of 1 is 20, area of 2 is 16
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