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3 years ago

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Mathematics

1 answer:

taurus [48]3 years ago

7 0

Answer:

105

Step-by-step explanation:

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An Item priced at $776 has a sales tax of $48.50. Find the sales tax rate expressed as a percent.

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An airline is planning its staffing needs for the next year. If a new route is approved, it will hire 837 new employees. If a n

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Considering a discrete distribution, it is found that the expected number of new employees to be hired by the airline is of 446.16.

<h3>What is the mean of a discrete distribution?</h3>

The expected value of a discrete distribution is given by the <u>sum of each outcome multiplied by it's respective probability</u>.

In this problem, considering the situation described in the text, the distribution is given by:

P(X = 837) = 0.37.

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Hence, the expected value is given by:

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More can be learned about discrete distributions at brainly.com/question/24855677

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The population of a city has decreased by 38% since it was last measured. If the current population is 27,900, what what the pre

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<u>Answer: </u>

The population of a city has decreased by 38% since it was last measured. If the current population is 27,900 .Previous population of city was 45000.

<u> Solution: </u>

Given that current population of city is 27900.

Also, population of a city has decreased by 38% since it was last measured.

Let assume that population of city when it was last measured = x

Decreased of 38% means x-38% of x . we can write this as,

$=x-\frac{38}{100} \times x$

$=\frac{100 x-38 x}{100}$

$=\frac{62 x}{100}=\frac{31 x}{50}$

So current population is $\frac{31 x}{50}$

Equating above expression to the given value of current population, we get

$\frac{31 x}{50}=27900$

$x=\frac{27900 \times 50}{31}$

x=45000

Hence previous population of city was 45000.

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