Prompt 1: A skilled worked requires at least 10 minutes, and no more than 20 minutes, to complete a certain task. The completion time X is a continuous random variable with density function f(x) = c/xº for 10 < x < 20 and f(x) = 0 for all other values of x. Find the expected time expected time for the worker to complete the task. Round your answer to three decimal places.
