In the number 9,999.999, how does the 9 in the hundredths place compare to the 9 in the place to its left?

Mathematics

1 answer:

Inessa [10]1 year ago

8 0

Answer:

Step-by-step explanation:

The 9 in the hundredth place means 0.01 so this can be 1/10 of the number on its left and 1/100 of the number 2 places to the left and will be 1/1000 3 places to the left and will continue with the number of terms to the left adding 1, 0.

1 place left means 1 more 0; 1/10

2 place left means 2 more 0s; 1/100

3 places left means 3 more 0s; 1/1000

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. If IQ scores are normally distributed with a mean of 100 and a standard deviation of 5, what is the probability that a person

bulgar [2K]

Answer:

2.28% probability that a person selected at random will have an IQ of 110 or greater

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:

$\mu = 100, \sigma = 5$