Let $0\mathrm{.}09e^{-0\mathrm{.}09t}$ for $0tbe$ a probability density function.

Show that the total area between the granh $of0\mathrm{.}09e^{-0\mathrm{.}09t}$ and the $t-$axis $is$ one.

ITan intermation her norta $to$ somnute tho monn $of$ thia nunhahiliter diatrihution funstion.

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