The center for science and industry sells adult tickets for $ 13 and children's tickets for $ 2. the expression 13 a plus 2 c represents the total revenue from selling a adult tickets and c children's tickets. evaluate the algebraic expression 13 a plus 2 c for a equals 127 and c equals 458.

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.