To estimate the quotient of decimals, use

Which graph shows a function with a range of all real numbers greater than or equal to -1

What is the value of r of the geometric series?

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?