Evaluate the expression when a=3, b=2, and c=12: 6+a​

How do i work this problem out using the equation a=pe^rt

The sixth grade art students are making a mosaic using tiles in the shape of right triangles. each tile has leg measures of 3 centimeters and 5 centimeters. i f there are 200 tiles in the mosaic what is the area of the mosaic.

Lisa has three classes that each last 50 minutes. what is the total number of minutes of the three classes