How do you calculate the sales tax for an item?

Evaluate the expression. (9 + 5)(3 + 2)0

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?

Which spreadsheet would be used to compute the first nine terms of the geometric sequence a^n=32•(1/2)n-1