What are the rational numbers?

Tyler enjoys the fish so much that after his birthday his family decides to take him to a famous aquarium a tank at the aquarium is similar to his tank with the scale factor of 8 how many times greater is the volume of the tank at the aquarium than the volume of tyler tank

Solve the equation by completing the square. x^2+2x=17

Interpret the following expression (5y^2-7)^3/(2y)^2