During the same cold week in chicago ,the midnight temperatures in fahrenheit were -2,-4,14,5,and -3. what was the average midnight temperature over that period?

Me. i can't figure out this question. give an explanation too. .

Find the area of the unshaded square

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?