a company installs 5000 light​ bulbs, each with an average life of 500​ hours, standard deviation of 100​ hours, and distribution approximated by a normal curve. find the approximate number of bulbs that can be expected to last the specified period of time. more than 740 hours question content area bottom part 1 a. 41 your answer is correct.b. 49 c. 4960 d. 499