Pip was thinking of a number pip divides by 2 and then adds 3 to get the answer of 13 what was the original number

Factor a^3 - 3 + 3a^2 - a. a) (a - 1)(a + 1)(a + 3) b) (a^2 + 1)(a - 3) c) (a^2 - 3)(a + 1)

Which basic geometric term has no width, no length, and no thickness? line b. point c. angle d. plane

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?