Help please I’m doing a test!! Please I’d give anything!

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?

If the sales price of a dvd is $20 and the markup is 34%, what is the cost of the dvd?

East black horse $0.25 total budget is $555 it'll cost $115 for other supplies about how many flyers do you think we can buy