Orion buys 3 books for a total of 25.50. He pays $8 plus sales tax for each book. He wants to know how much the sales tax is for one book. Let "t" equal the sales tax Orion pays for each book. Write an equation that represents this situation.

25.5 = 3(8t)

the total is 25.5 and you have 3 books. you pay $8 for each book + the sales tax per book.

Edge length of the side of a cube = 5 inches
Then
Volume of the cube = (side)^3
                                = (5)^3
                                 = 125 inches ^3
So the volume of the actual cube is 125 inches^3
Now after the side lengths are triple, then
New edge length of each side = 3 * 5 inches
                                                = 15 inches
Then
New volume of the cube = (New side)^3
                                        = (15)^3
                                         = 3375 inches^3
Then the volume of the new  cube is 3375 inches^3
So
The number of times the volume of the new cube is greater = 3375/125
                                                                                                 = 27
So the volume of the new cube is 27 times greater than the old cube.