Olivia offers tutoring every Tuesday morning. She charges each person a fee of $10 plus $5 an hour for tutoring. Which equation best represents the relationship between x and y? y = 15x
y = 5x +10
y = 10x + 5
5y = 10 + x

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.