the average person loses about 8×10 strands of hair how many strands of hair does the average person lose in 9 days

2 answers:

5 0

810 strands of hair is lost in 9 days
(8x10= 80, 80x9=720)
count on your fingers (ONLY WHEN MULTIPLYING BY 9) and then put the finger down that you're multiplying 9 by and then look at the fingers around it. (7 and 2 then since its 80 add a 0!)

Masteriza [31]3 years ago

3 0

It depends you mean per day or if so..... it is 720

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Step-by-step explanation:

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Mary and Jane both took PSY230 last semester but they were in two different sections taught by different professors. Mary's clas

Greeley [361]

Answer:

Due to the higher z-score, Jane did better in class.

Step-by-step explanation:

Z-score:

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 question:

Whoever's grade had the better z-score did better in class.

Mary's:

Mean of 85, standard deviation of 5, grade of 88. This means that $\mu = 85, \sigma = 5, X = 88$ . So