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acrooks86
07.04.2020 •
Mathematics
A boat can travel 110 kilometers on 110 liters of gasoline. How far can it
travel on 59 liters?
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Ответ:
59 kilometers.
Step-by-step explanation:
We are given a 1/1 ratio (110/110) at the beginning of the problem. All we need to do after we have that given is apply it to 59 liters.
59 x 1 = 59 kilometers.
Ответ:
57.62% probability that a randomly selected adult has an IQ between 89 and 121.
Step-by-step explanation:
When the distribution is normal, we use the z-score formula.
In a set with mean
and standard deviation
, the zscore of a measure X is given by:
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, we have that:
Find the probability that a randomly selected adult has an IQ between 89 and 121.
This is the pvalue of Z when X = 121 subtracted by the pvalue of Z when X = 89. So
X = 121
X = 89
0.7881 - 0.2119 = 0.5762
57.62% probability that a randomly selected adult has an IQ between 89 and 121.