Mean and median of 1024 divided by 16 and of these numbers 34,48,52,61,76,76,61,84,61,39,83,61 ,79,81,56,88

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?

Given δjkl : δxyz, find x. a)10 b)12 c)16 d)20

Darragh has a golden eagle coin in his collection with a mass of 13.551\,\text{g}13.551g. an uncirculated golden eagle coin has a mass of 13.714\,\text{g}13.714g.