What does the statement P(10) = N mean

Which expression is equivalent to -12(3x-3/4)

The patient recovery time from a particular surgical procedure is normally distributed with a mean of 5.2 days and a standard deviation of 1.7 days. what is the probability of spending more than 2 days in recovery? (round your answer to four decimal places.)

A5 foot long board is propped against the wall of a house. the board forms a 60° angle with the ground. how far is the base of the board from the wall?