A company installs​ 5,000 light bulbs. The lifetimes of the lightbulbs are approximately normally distributed with a mean of 500 hours and a standard deviation of 100 hours. Find the approximate number of bulbs that can be expected to last more than 400 hours. Question content area bottom Part 1 A. ​2,207 B. ​4,219 C. ​4,195 D. ​4,205