The function pexp(x, rate=r) can be used to compute the probability that an exponential variable is less than x. Suppose the time between accidents at an intersection can be modeled by an exponential...

The function pexp(x, rate=r) can be used to compute the probability that an exponential variable is less than x. Suppose the time between accidents at an intersection can be modeled by an exponential distribution with a rate of 0.05 per day. Find the probability that the next accident will occur during the next three weeks.