Let X denote the distance (in metres) that an animal moves from itsbirth site to its first

home. Suppose that for a certain type of kangaroo, X followsan exponential distribution

with parameter λ= 0.014 (as suggested in the article“Competition and Dispersal from

Multiple Nests” in Ecology, 1997).

a. Find the probability that the distance travelled is at most71.43 m.

b. What is the value for the median distance.