The area of a rectangle is 24 square centimeters and it’s lengths are x centimeters and x+2 centimeters a. find the side lengths of the rectangle. justify your answer. b. find the perimeter of the rectangle

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?