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guajiro [1.7K]
3 years ago
10

Hello the math quizzes help

Mathematics
1 answer:
11111nata11111 [884]3 years ago
4 0
D the last function is non-linear
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What does perpendicular mean?​
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a straight line at an angle of 90° to a given line, plane, or surface.

Step-by-step explanation:

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PLEASE HELP 7TH GRADE MATH
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3 years ago
A videotape store has an average weekly gross of $1,158 with a standard deviation of $120. Let x be the store's gross during a r
statuscvo [17]

Answer:

The number of standard deviations from $1,158 to $1,360 is 1.68.

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore 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 pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

\mu = 1158, \sigma = 120

The number of standard deviations from $1,158 to $1,360 is:

This is Z when X = 1360. So

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

Z = \frac{1360 - 1158}{120}

Z = 1.68

The number of standard deviations from $1,158 to $1,360 is 1.68.

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The height of a street light is 25 feet. It casts a 20−foot shadow. At the same time, a man standing next to the street light ca
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