Solve the problem.
-Computer experts warn that writable compact disks such as CD-Rs (Compact Disc-Recordable) and CD-RWs
(Compact Disc-ReWriteable) have much shorter lifespans than other digital storage methods such as hard
drives or magnetic tape. The time until the disc becomes unreadable for a particular brand of CD-RWs is a
continuous random variable with probability density function given by the following function. Round to two decimal
places. (A) What is the probability that a disc is not readable after 25 years? (
B) What is the probability that the disc is readable after 10 years? (
C) If the user wants the probability that the disc is readable to be 0.9, when is the last time it should be read?

Question

Solve the problem.
-Computer experts warn that writable compact disks such as CD-Rs (Compact Disc-Recordable) and CD-RWs
(Compact Disc-ReWriteable) have much shorter lifespans than other digital storage methods such as hard
drives or magnetic tape. The time until the disc becomes unreadable for a particular brand of CD-RWs is a
continuous random variable with probability density function given by the following function. Round to two decimal
places.  (A) What is the probability that a disc is not readable after 25 years? (
B) What is the probability that the disc is readable after 10 years? (
C) If the user wants the probability that the disc is readable to be 0.9, when is the last time it should be read?

Quizplus · Accepted Answer

The Answer of Solve the problem.
-Computer experts warn that writable compact disks such as CD-Rs (Compact Disc-Recordable) and CD-RWs
(Compact Disc-ReWriteable) have much shorter lifespans than other digital storage methods such as hard
drives or magnetic tape. The time until the disc becomes unreadable for a particular brand of CD-RWs is a
continuous random variable with probability density function given by the following function. Round to two decimal
places.  (A) What is the probability that a disc is not readable after 25 years? (
B) What is the probability that the disc is readable after 10 years? (
C) If the user wants the probability that the disc is readable to be 0.9, when is the last time it should be read?

Solve the Problem. -Computer Experts Warn That Writable Compact Disks Such as CD-Rs