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Anastaziya [24]
3 years ago
5

Casandra needs 2 meters of string for her kite how many centimeters of string does she need

Mathematics
2 answers:
inna [77]3 years ago
4 0

Answer:

200 cm

Step-by-step explanation:

2*100= 200

Margarita [4]3 years ago
3 0

Answer: 200 centimeters

Step-by-step explanation:

100 centimeters = 1 meter

? centimeters = 2 meters

100 x 2 = 200

200/1 = 200 centimeters

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A set of test scores is normally distributed with a mean of 130 and a standard deviation of 30 What score is necessary to reach
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Answer:

A score of 150.25 is necessary to reach the 75th percentile.

Step-by-step explanation:

Problems of normal distributions can be 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.

A set of test scores is normally distributed with a mean of 130 and a standard deviation of 30.

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This is X when Z has a pvalue of 0.75, so X when Z = 0.675.

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0.675 = \frac{X - 130}{30}

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Please help me with #7
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Step-by-step answer:

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