I know 12 to 15 i equivalent to 4:5 but how explain or show your work

When you find the area of a triangle do you use in. or in2

What are the solutions of the equation x4 – 5x2 – 14 = 0? use factoring to solve. someone !

Paul bakes raisin bars in a pan shaped like a rectangular prism. the volume of the pan is 252 cubic inches. the length of the pan is 12 inches, and its width is 10 1/2 inches. what is the height of the pan? enter your answer in the box. will give brialist and pointsss !