BRAINLIST--- A simple gear train below has a 15 tooth DRIVER gear and a 60 tooth DRIVEN gear. What is the gear ratio of the following system?

if not right or not an answer I will be just marking it

Need on this geometry question. explain how you did it.

True or false look at the picture pls : /

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?