The Fraction of Television Sets Manufactured by a Certain Company $f ( t ) = e ^ { - 0.1 t }$

Multiple Choice

The fraction of television sets manufactured by a certain company that are still in working condition after t years of use is approximately $f ( t ) = e ^ { - 0.1 t }$ . What fraction can be expected to fail before 5 years of use? Round your answer to two decimal places, if necessary.

A) 0.61
B) 1.65
C) 0.39
D) 1.00