Answer:
a. 67.5
Step-by-step explanation:
∵ 1 qt = 0.25 gallon
Also, 1 hour = 60 minutes,
⇒ 1 minute = [tex]\frac{1}{60}[/tex] hour,
[tex]\implies 4.5\text{ qt per minute}[/tex]
[tex]=\frac{4.5\times 0.25}{\frac{1}{60}}\text{ gal per hour}[/tex]
[tex]=4.5\times 0.25\times 60\text{ gal per hour}[/tex]
[tex]=67.5\text{ gal per hour}[/tex]
Hence, option 'a' is correct.
