Price is $166.30 she has $7.08 how much more is needed

Find the solutions for a triangle with a =16, c =12, and b = 63º

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?

Which of the following is not a subset of {1,2,3}?