suppose that the lifetimes of a certain kind of light bulb are normally distributed with a standard deviation if 110 hours. if exactly 95% of the bulbs die before 920 hours, find the mean lifetime if the bulbs aleks answer

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.

Noel is hoping to make a profit (in $) on the school play and has determined the function describing the profit to be f(t) = 8t – 2654, where t is the number of tickets sold. what does the number 8 tell you?

Every weekday, mr. jones bikes from his home to his job. sometimes he rides along two roads, the long route that is shown by the solid lines. other times, he takes the shortcut shown by the dashed line. how many fewer kilometers does mr. jones bike when he takes the shortcut instead of the long route?