Company XYZ know that replacement times for the quartz time pieces it produces are normally distributed with a mean of 17.6 years and a standard deviation of 1 years. Find the probability that a...

Extracted text: Company XYZ know that replacement times for the quartz time pieces it produces are normally distributed with a mean of 17.6 years and a standard deviation of 1 years. Find the probability that a randomly selected quartz time piece will have a replacement time less than 15.8 years? P(X < 15.8="" years)="Enter" your="" answer="" accurate="" to="" 4="" decimal="" places.="" answers="" obtained="" using="" exact="" z-scores="" or="" z-scores="" rounded="" to="" 3="" decimal="" places="" are="" accepted.="" if="" the="" company="" wants="" to="" provide="" a="" warranty="" so="" that="" only="" 2.3%="" of="" the="" quartz="" time="" pieces="" will="" be="" replaced="" before="" the="" warranty="" expires,="" what="" is="" the="" time="" length="" of="" the="" warranty?="" warranty="years" enter="" your="" answer="" as="" a="" number="" accurate="" to="" 1="" decimal="" place.="" answers="" obtained="" using="" exact="" z-scores="" or="" z-scores="" rounded="" to="" 3="" decimal="" places="" are="">