Doubling all the dimensions of a triangular pyramid, the volume of the pyramid becomes quadrupled.
Explanation:
The volume of the triangular pyramid is given by
where b is the base of the pyramid and
h is the height of the pyramid.
Doubling all the dimensions of the pyramid, we have,
and
Thus, volume of the triangular pyramid is given by
Multiplying, we get,
Thus, doubling all the dimensions of a triangular pyramid, the volume of the pyramid becomes quadrupled.
Answer:
135 ft^2
Step-by-step explanation:
7yd = 7*3 feet = 21 feet
For a sample size of 20 players, 68% of the sample means fall within 19.32 and 20.98
<h3>What is a sample size?</h3>The sample size is a term used in market research for defining the number of subjects included in a sample size. By sample size, we understand a group of subjects that are selected from the general population and is considered a representative of the real population for that specific study.
Empirical rule states that for a normal distribution, 68% of the values are within one standard deviation from the mean, 95% of the values are within two standard deviation from the mean and 99.7% of the values are within three standard deviation from the mean.
For a population mean of 20.15 and a standard deviation of 3.7
68% are within μ ± σ/√n,
hence,
68% = 20.15 ± 3.7/√20 = (19.32, 20.98)
For a sample size of 20 players, 68% of the sample means fall within 19.32 and 20.98.
To learn more about sample size from the given link:
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