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miss Akunina [59]

3 years ago

10

1.) Lois buys about 3 packs of cigarettes per week. Cigarettes are $12.50 per pack. How much money can she save in one year if s

he quits?

1 answer:

Mars2501 [29]3 years ago

5 0

$12.50 x 3
=$37.5 in a week.

1 year = 48 weeks
37.5 x 48 = $1,800
She saves $1800 a year

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The top coordinates of the X shape are:

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For 90 degrees counterclockwise rotation, the rule is:

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For 180 degrees rotation, the rule is:

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For 270 degrees counter rotation, the rule is:

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Read more about rotations at:

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1a. [1 mark] The price per kilogram of tomatoes, in euros, sold in various markets in a city is found to be normally distributed

andrey2020 [161]

Answer:

The price that is two standard deviations above the mean price is 4.90.

Step-by-step explanation:

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the z-score of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

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This is X when Z = 2. So

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$2 = \frac{X - 3.22}{0.84}$

$X - 3.22 = 2*0.84$

$X = 4.9$

The price that is two standard deviations above the mean price is 4.90.

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3 years ago