Please add an explaination. I need it ASAP. 50 points for whoever answers the correct one.

Simplify: (m^2n)(m^3n^4)

Can you simplify 4/7? 24 points will be awarded!

Sasha drank 8 bottles of water everyday for a week. how many bottles of water did she drink in total?

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?