Let T be the time taken in minutes to see a doctor. The surgery stipulates that no one will have to wait longer than 35 minutes. The probability density function is
given by
f(t)= t/450 ,0≤t≤35
Determine
a) The mean waiting time µ
b) The standard deviation σ
c) The probability that you will see a doctor within 15 minutes.

Triangle xyz, with vertices x(-2, 0), y(-2, -1), and z(-5, -2), undergoes a transformation to form triangle x? y? z? , with vertices x? (4, -2), y? (4, -3), and z? (1, -4). the type of transformation that triangle xyz undergoes is a . triangle x? y? z? then undergoes a transformation to form triangle x? y? z? , with vertices x? (4, 2), y? (4, 3), and z? (1, 4). the type of transformation that triangle x? y? z? undergoes is a .