WHAT ARE THE EASIEST AP CLASSES? AND WHAT ARE THE HARDEST AP CLASSES?

Facial shaving brushes are either bulb-shaped or fan-shaped. an experiment is to be conducted to determine whether the lather thickness is the same for both types of shaving brushes. in previous studies, it was determined that shaving brush size (small, medium, large) is associated with lather thickness, but shaving brush type (wolf whiskers, maggard razors, frank shaving, and so on) is not associated with lather thickness. how could the experiment best be conducted? by blocking on shaving brush size by blocking on shaving brush type by blocking on shaving brush shape by blocking on lather thickness without blocking

I’m so stuck on this question i’ll give anybody brainliest and free points for the correct give the most space to a. the largest vehicle b. the fastest road user c. a potential drunk driver d. the biggest hazard

Alife insurance salesman sells on the average 3 life insurance policies per week. use poisson's law to calculate the probability that in a given week he will sell 2 or more policies but less than 5 policies? i just require an answer.