Which rule describes the composition of transformations that maps figure ABCDE to figure A”B”C’D”E”

In simplified exponential notation, the expression a^2•a^-3•a 1/a 0

∆red ≅ ∆ by rule will give brainiest if possible

Awater tank holds 18000 gallons. how long will it take for the water level to reach 6000 gallons if the water is used at anaverage rate of 450 gallons per day