Answer:
The answer is option D.
Step-by-step explanation:
Mauricio wants to fry 18 potatoes per hour for 3.5 hours.
So, total becomes = [tex]18\times3.5=63[/tex]
As he can fry 6 potatoes using each gallon of oil.
So, for 63 potatoes, he will need = [tex]\frac{63}{6}=10.5[/tex] gallons.
Therefore, the correct answer is option D.