The weekly standard is a politically conservative magazine (and website), described in ads as humorous and witty. this magazine is read by some of the most powerful men and women in government, politics, and the media. according to a survey conducted by magazine staff, the mean amount spent during the past 12 months for personal or vacation travel is $6159. suppose the distribution of the amount spent by a subscriber during the past 12 months for personal or vacation travel can be modeled by an exponential random variable.

consider the value of λ as 0.00016236.

fill in the blanks. (give your answers to four decimal places.)
the probability that a randomly selected subscriber spent more than $8000 for personal or vacation travel during the past 12 months is _(answer

the probability that a randomly selected subscriber spent between $5000 and $10,000 for personal or vacation travel during the past 12 months is _(answer

if a subscriber spent less than $500 for personal or vacation travel during the past 12 months, the circulation department will no longer hand-deliver each issue. the probability that a randomly selected subscriber will no longer receive hand delivered issues is _(answer