Multiple Choice
A manufacturer of light bulbs wants to produce bulbs that last about 400 hours but,of course,some bulbs burn out faster than others.Let F(t) be the fraction of the company's bulbs that burn out before t hours. F(t) lies between 0 and 1. Let
.What is the value of
?
A) 
B) 
C) 
D) 
E) 
Correct Answer:
Verified
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