(Solved): PLEASE circle and underline each specific answer Over time, the number of original basic words in a ...

Over time, the number of original basic words in a language tends to decrease as words become obsolete or are replaced with new words. For a certain language, the proportion of words that remain after t millennia is a random variable that is exponentially distributed with a = 0 239. Complete parts (a) and (b). a. Find the life expectancy and standard deviation of a word from this language. What is the life expectancy? millennia (Round to two decimal places as needed.) What is the standard deviation? millennia (Round to two decimal places as needed) b. What is the probability that a randomly chosen word from this tanguage will remain after 1000 years? (Round to four decimal places as needed.)