The Density Function for the Waiting Time at a Bank $p ( t ) = 0.1 e ^ { - 0.1 t } , t > 0$

Essay

The density function for the waiting time at a bank is modeled by $p ( t ) = 0.1 e ^ { - 0.1 t } , t > 0$ and is measured in minutes.(a) Find the median waiting time.(b) Find the mean waiting time.(c) Sketch the graph of the density function showing the median and mean.