Which is a better discount $61.99 for 75% off or $80.99 for 80% off?

Standard deviation of 19,29,21,22,23

What is the similarity ratio of a cube with volume 729m^3 to a cube with volume 3375 m^3

The diagram represents the polynomial 4x2 + 23x – 72. what is the factored form of 4x2 + 23x – 72? (4x + 8)(x – 9) (4x – 8)(x + 9) (4x + 9)(x – 8) (4x – 9)(x + 8)