A retail store charges a flat fee of $45 to diagnose a computer problem, plus $20 per hour to repair the computer. A self-employed repairman charges $35 per hour to diagnose and repair a computer. After how many hours of repair work would the retail store and the repairman charge the same amount?

Nour and rana are shopping for a christmas tree. they are deciding between 2 22 different types of trees (real and fake) and 4 44 colors for the ornaments (white, silver, gold, and purple). they each created a display to represent the sample space of randomly picking a type of tree and a color for the ornaments. whose display correctly represents the sample space?