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ollegr [7]
3 years ago
10

In 2002, the price of mailing a letter was $0.34 for the first ounce or part of an ounce and $0.21 for each ounce or part of an

ounce after the first ounce. How much did it cost to mail a four-ounce letter?
Mathematics
1 answer:
tensa zangetsu [6.8K]3 years ago
3 0
The equation would be .34 + .21(x -1) = C  where x is the number of ounces and C = the cost.  Let x = 4 to answer the question.
.34 + .21(4-1) = C   Do the work in the parentheses
.34 + .21(3) = C   multiply
.34 + .63 = C   Add
.97 = C
The cost to mail the letter is $0.97.
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We can first solve the equation;
x² - 6x + 9 =0, using completing square method;
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In your own words, explain the Normal Distribution and provide a real world example.
elena-14-01-66 [18.8K]

Answer:

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Is symmetrical and bell shaped no matter the parameters used. Usually if X is a random variable normally distributed we write this like that:

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The two parameters are:

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One particular case is the normal standard distribution denoted by:

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Example: Usually this distribution is used to model almost all the practical things in the life one of the examples is when we can model the scores of a test. Usually the distribution for this variable is normally distributed and we can find quantiles and probabilities associated

Step-by-step explanation:

The Normal distribution is a continuous probability distribution with possible values all the reals. Some properties of this distribution are:

Is symmetrical and bell shaped no matter the parameters used. Usually if X is a random variable normally distributed we write this like that:

X \sim N(\mu , \sigma)

The two parameters are:

\mu who represent the mean and is on the center of the distribution

\sigma who represent the standard deviation  

One particular case is the normal standard distribution denoted by:

Z \sim N(0,1)

Example: Usually this distribution is used to model almost all the practical things in the life one of the examples is when we can model the scores of a test. Usually the distribution for this variable is normally distributed and we can find quantiles and probabilities associated

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I wrote it out on paper and uploaded the answer for you. Let me know if you have any questions.

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Answer:

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Step-by-step explanation:

Basically I did it backwards & opposites:

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I checked btw and it worked.

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