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3 years ago

Brainliest + Points (please explain)

Mathematics

1 answer:

kotegsom [21]3 years ago

5 0

Answer:

$2970.25

Step-by-step explanation:

Please write the formula all on one line:

M = P(1 + r)^n, where P is the principal, r is the annual interest rate as a decimal fraction and n is the number of years.

Here, that comes to:

M = $2,500(1 + 0.09)^2, or

= $2,500 (1.09)^2, or

M = $2,500(1.1881), or

M = $2970.25.

$2970.25 will be needed to pay back this $2,500 loan.

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3 years ago

Relationships between means, standard deviations, X values,and z-scores

Vlada [557]

Answer:

a) The average salary of firefighters in Portugal is $583.

b) The standard deviation of the salary of firefighters in Portugal is $319.8

Step-by-step explanation:

We are given the following in the question:

a) Standard Deviation, σ = $145.80

We are given that the distribution of salary of professor is a bell shaped distribution that is a normal distribution.

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$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

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We are given that the distribution of salary of computer programmers is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

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Putting values, we get,

$0.50 = \displaystyle\frac{2291.90-2132}{\sigma}\\\\\sigma= \frac{2291.90-2132}{0.50}\\\\\sigma = 319.8$

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Answer:

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Step-by-step explanation:

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