Is the sequence geometric? if so, identify the common ratio 3, 12, 48, 192

1 answer:

4 0

Indeed, this is a geometric sequence.

The common ratio is 4.

(To find this answer, divide a number in the term to the number previous to that particular term. for example, 12 and 3. Divide 12 and 3, and it will give you 4.)

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Grades between 62 and 64 result in a D grade.

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:

$\mu = 71.9, \sigma = 7.8$