The diameter of a circle is 15 m. Find the circumference \textit{to the nearest tenth}to the nearest tenth.
1 answer:
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Answer:
2.28% of tests has scores over 90.
Step-by-step explanation:
Problems of normally distributed samples are solved using 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 problem, we have that:
What proportion of tests has scores over 90?
This proportion is 1 subtracted by the pvalue of Z when X = 90. So
has a pvalue of 0.9772.
So 1-0.9772 = 0.0228 = 2.28% of tests has scores over 90.
Answer:
option-B
Step-by-step explanation:
we know that
Sum rule of logarithm:
which is same as
the log of a product (ab) is equal to the addition of log a nad log b
Subtraction rule of logarithm:
which is same as
the log of the quotient of a and b is equal to the log of a minus the log of b
Exponent rule of logarithm:
which is same as
the log of the quantity a raised to b is equal to the product of b and the log of a
so,
option-B is not correct