Elle had dinner at his favorite restaurant. if the sales tax rate is 5% and the sales tax on the meal came to $2.00, what was the total cost of the meal, including sales tax and a 15% tip?

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?