Johnny wants to put edging around his garden at the right. if edging is 1.50 per 2 foot strip. what will the total cost be for edging?

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?