Arrange the digits 9,5,89,5,89, comma, 5, comma, 8 and 999 to create the greatest possible four-digit number.

For a read-a-thon, jay and odhràn each started reading a book at the same time and continued reading for several hours. jay's book had 278 pages, and he read 55 pages per hour. odhràn's book had 238 pages, and he read 45 pages per hour. after how many hours did they have the same number of pages left, and how many pages were left?

Iam so stuck. what is the worked out answer for this question?

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?