Answer:
see the explanation
Step-by-step explanation:
The given rate is
[tex]480\ \frac{gal}{h}[/tex]
Create three different rates, that are all  equivalent to this rate
First rate
1,440 gallons in 3 hours
Find the units rate
Divide the total volume by the total time
[tex]\frac{1,440}{3}=480\ \frac{gal}{h}[/tex]
Second rate
960 gallons in 120 minutes
Find the units rate
Divide the total volume by the total time
Convert minutes to hours
[tex]120 \ min=2\ h[/tex]
[tex]\frac{960}{2}=480\ \frac{gal}{h}[/tex]
Third rate
720 gallons in 1.5 hours
Find the units rate
Divide the total volume by the total time
[tex]\frac{720}{1.5}=480\ \frac{gal}{h}[/tex]
Convert gal/h to gal/min
Remember that
[tex]1\ h=60\ min[/tex]
[tex]480\ \frac{gal}{h}=480/60=8\ \frac{gal}{min}[/tex]