Which expression is a rational number? a) ( 25 + 25 )2 b) ( 25 + 50 )2 c) ( 50 + 75 )2 d) ( 25 + 72 )2

Is the response to the survey question "did you smoke in the last week question mark "response to the survey question "did you smoke in the last week? " a discrete random variable, a continuous random variable, or not a random variable?