20) If the tax you pay when you purchase an item is 7% of the sale price, determine the
total price, including tax, of an item that
costs $120.
A) $113
B) $127
C) $119.20 D) $131.35
E) $128.40

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?