$345 at 4% per year for 3 years

F(n + 1) = f(n) – 8. if f(1) = 100, what is f(6)?

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?

Find the distance between the point (-3,-4), and (see the picture below)