D = 3.2(t+1)(2t - 3) An air pump increases the oxygen levels in
an aquarium and reduces the build-up of
waste materials. The equation shown above
gives the depth, d, in inches of an air
bubble beneath the surface of the water t
seconds after it emerges from the air pump.
After how many seconds does the air
bubble reach the surface?

[tex]D = 3.2(t+1)(2t - 3) An air pump increases the oxygen levels in an aquarium and reduces the build[/tex]