A household is advertised as having more than 10-yr life. If the following is PDF, determine its reliability for the next 10 yrs if it survived a 1-yr warranty period:
f(t) = 0.1(1 + 0.05t)^-3 t>=0
a) What is its MTTF before waranty?
b) what is MTTF after the warranty period assuming it survived?