Missed Work Hours Caused by One of a Class of Industrial

question 13

Short Answer

Missed work hours caused by one of a class of industrial accidents has a probability density function $f ( t ) = \frac { 1 } { 8 } e ^ { - t } + \frac { 3 } { 8 } e ^ { - t / 2 } + \frac { 1 } { 24 } e ^ { - t / 3 }$ where t is measured in hours.
-What proportion of these accidents result in more than 9 missed work hours?
Enter just a real number to two decimal places.

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Definitions:

Overestimate

To assess something as larger or more important than it actually is; making an assessment that exceeds the true dimensions or scope.

Electronic Medium

A form of communication or media that utilizes electronic technology for disseminating information, such as the internet or digital television.

Psychological Control

The manipulation of someone else's psychological and emotional state to influence their behavior, often in a negative way.

Punishment

The infliction of a penalty or negative consequence on someone as a response to undesirable behavior, intended to decrease that behavior's occurrence.