If Ryan slices the pyramid parallel to any side of the pyramid other than the base, what will the shape of the cross section be?
2 answers:
Answer with explanation:
A pyramid is a three dimensional solid , having base in the shape of any polygon and other faces are in the shape of triangle meeting at a point.
So, if you cut the pyramid , parallel to any side of the pyramid other than the base you will obtain
A pyramid having same base as original pyramid, that will be the top view but front view will be of trapezoid.
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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.