Roll 6 sided dice two times. Whats the probability of rolling a 1 and then rolling a 5?

Which graph represents the solution of the inequality?

An an average person has 6×10 by the power of two as many red blood cells as white blood cells a small sample of the blood has 7×10 by the power of three white blood cells about how many red blood cells are in the sample

Pls! does anybody know a shortcut for answering these types of questions in the future?