Which of the following shows the factored form of the denominator of the given expression x^3+5x^2-4x-20/x^3+7x^2+10x
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The empirical rule says that approximately 68% of any normal distributed data set lies within one standard deviation of the mean.
The same rule states that about 95% lies within two standard deviations of the mean. Using this rule, and the fact that any normal distribution is symmetric about its mean, you have