Which itens have the same precent discount? items orignal price sale price
Sweaters $40.00 $32.00
Shorts $30.00 $24.00
Jeans $50.00 $40.00
Shirts $45.00 $35.00

Victor chose C. how did he git that answer?

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.