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strojnjashka [21]
3 years ago
14

A restaurant automatically charges a 20% gratuity if a party has 6 or more people. How much gratuity is added to a party of 6 on

a $141 bill?
Mathematics
1 answer:
kotegsom [21]3 years ago
4 0

$28.20 gratuity is added on a bill of $141.

Step-by-step explanation:

Given,

Gratuity charged by restaurant = 20%

Total bill = $141

Gratuity amount = 20% of total bill

Gratuity\ amount=\frac{20}{100}*141\\\\Gratuity\ amount=\frac{2820}{100}\\\\Gratuity\ amount=\$28.20\ \

$28.20 gratuity is added on a bill of $141.

Keywords: percentage, division

Learn more about percentages at:

  • brainly.com/question/11203617
  • brainly.com/question/11253316

#LearnwithBrainly

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Time spent using​ e-mail per session is normally​ distributed, with mu equals 11 minutes and sigma equals 3 minutes. Assume that
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Step-by-step explanation:

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Normal probability distribution

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The Central Limit Theorem estabilishes that, for a random variable X, with mean \mu and standard deviation \sigma, a large sample size can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}

In this problem, we have that:

\mu = 11, \sigma = 3

a. If you select a random sample of 25 ​sessions, what is the probability that the sample mean is between 10.8 and 11.2 ​minutes?

Here we have that n = 25, s = \frac{3}{\sqrt{25}} = 0.6

This probability is the pvalue of Z when X = 11.2 subtracted by the pvalue of Z when X = 10.8.

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Z = \frac{X - \mu}{s}

Z = \frac{11.2 - 11}{0.6}

Z = 0.33

Z = 0.33 has a pvalue of 0.6293.

X = 10.8

Z = \frac{X - \mu}{s}

Z = \frac{10.8 - 11}{0.6}

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Z = -0.33 has a pvalue of 0.3707.

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