10,000 students took a math test. If their average score was 40 with a standard deviation of 10, how many students must have scored between 20 and 40 marks? A. 3,772 B. 2,227 C. 5,000 D. 3,334 E. 4,772

My hour hand points between the 8 and the 9 in 35 minutes it will be the next hour. what time is it ?

Jorge wants to determine the enlarged dimensions of a digital photo to be used as wallpaper on his computer screen. the original photo was 800 pixels wide by 600 pixels high. the new photo will be 1,260 pixels wide. what will the new height be?

Find the axis of symmerty for x y=x squared -4x-8