How do u wok out 6 divide 3/5

Which statement about perfect cubes is true

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?