The life, X, of the StayBright light bulb is modelled by the probability density function\[f(x)=\left(\begin{matrix}2x^{-2} \\ 0\end{matrix}\right)\]\[x \ge 0\]otherwise.
Where X is measures in thousands of hours
Find the probability that a StayBrite bulb lasts longer than 1000 hours.

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f(x) is the function sine. Ok... How do you do that?

sorry, it's 2e^-2

so \[f(x)=2e ^{-2}\]

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