The fraction of television sets manufactured by a certain company that are still in working condition after t years of use is approximately $f ( t ) = e ^ { - 0.2 t }$ . What fraction can be expected to fail before 4 years of use? Round your answer to two decimal places, if necessary.

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The Answer of The fraction of television sets manufactured by a certain company that are still in working condition after t years of use is approximately $f ( t ) = e ^ { - 0.2 t }$ . What fraction can be expected to fail before 4 years of use? Round your answer to two decimal places, if necessary.

The Fraction of Television Sets Manufactured by a Certain Company f(t)=e−0.2tf ( t ) = e ^ { - 0.2 t }f(t)=e−0.2t

The Fraction of Television Sets Manufactured by a Certain Company $f ( t ) = e ^ { - 0.2 t }$