lavatory tests show that the lives of light bulbs are normally distributed with a mean of 750 hours and a stoandard devotion of 75 hours. Find the porbability that a randomly selected light bulb will last between 900 and 975 yours

Amira is painting a rectangular banner 2 1/4 yards wide. the banner will have a blue background. amira has enough paint to cover 1 1/2 square yards of the wall. the school colors are blue and yellow, so amira wants to add yellow rectangles on the left and right sides of the blue rectangle. the yellow rectangles will each be 3/4 yards wide and the same height as the blue rectangle. what will be the total area of the two yellow rectangles?