Marco started work 9 hours and 36 minutes before 22:28. What time did he start work? Give your answer in 24 hour time.

For what value of x does 4x = (1/8) x + 5?

Bob is putting books on a shelf and takes a break after filling 18 1/2 inches on the book shelf. the book shelf is now 2/3 full. how long is the entire bookshelf?

When solving this problem: 3025/5.5 = a/90.75 you get 49912.5 which would be the length of one of the sides of a square when the area is only 90.75 inches. is that answer correct, why, and how is it possible?