Find the approximate value of the circumference of a circle with the given radius. use = 3.14. round your results to one more decimal than in the given radius. 4 inches c = 12.5 inches 12.6 inches 25.1 inches 25.2 inches

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?