Explanation:
To determine which restaurant uses more flour per pizza crust, we need to calculate the flour-to-crust ratio for each restaurant.
For Pizzarelli's Pizzeria:
Flour used for 4 pizza crusts = 9 cups
Flour per pizza crust = 9 cups / 4 crusts = 2.25 cups per crust
For Antoni's Pizza:
Flour used for 6 pizza crusts = 15 cups
Flour per pizza crust = 15 cups / 6 crusts = 2.5 cups per crust
Comparing the ratios, Antoni's Pizza uses more flour per pizza crust (2.5 cups) compared to Pizzarelli's Pizzeria (2.25 cups).