Country A has half the output per worker of country B, but country A's growth rate is 2 percentage points higher than country B's. About how long will it take output per worker in country A to catch up to output per worker in country B?

Many newspapers carry a certain puzzle in which the reader must unscramble letters to form words. how many ways can the letters of emdangl be arranged? identify the correct unscrambling, then determine the probability of getting that result by randomly selecting one arrangement of the given letters.