49 47 43 50 45 49 49 49 43 50 43 47 47 46 45 49 50 49 43 50 46 46 50 48 47 49 47 46 43 48 50 47 46 Calculate the standard deviation with your calculator. (Round to the nearest tenth)​

Ineed with number 6 , explain how to get 1978

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?

If a 36 inch yardstick casts a 21 foot shadow, how tall is a building whose shadow is 168 feet? what is the scale factor