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]

3/2=1.5 sec

Step-by-step explanation:

Equate d=0 and solve the expression, t=-1 and 3/2 but t can't be negative.

$5.41

step-by-step explanation:

$20 - $14.51 = $5.49.

Aquadratic function is one of the form f(x)=ax2 + bx + c l, where a,b, and c are numbers with are not equal to zero.