The empirical rule says that approximately 68% of a normal distribution falls within one standard deviation of the mean. In this case, this would include all values of the variable in the interval 
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Carla buys a dress that cost $20.00. She pays 7% sales tax. How much does she pay fo the dress, with tax? A. $21.40 B. $34.00 C.
2 answers:
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The net pay is the amount left after taxes and deductions have been removed from the gross pay.
Her monthly gross pay is: $4111.93
The deductions are:
Let her gross pay be x.
So, we have:
So, we have:
Express percentage as decimals
Add 102 to both sides
Divide both sides by 0.95
Rewrite as:
Hence, her monthly gross pay is: $4111.93
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