Marty ate 4/6 of his pizza and luis ate 5/6 of his pizza. marty ate more pizza than luis. how is that possible

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

Monitors manufactured by tsi electronics have life spans that have a normal distribution with a standard deviation of 1800 hours and a mean life span of 20,000 hours. if a monitor is selected at random, find the probability that the life span of the monitor will be more than 17,659 hours. round your answer to four decimal places.

Of of at a : $6, $8, $7, $6, $5, $7, $5, $7, $6, $28, $30 is?ato .ato .ato .ato .