A flight consumes fuel at 450 lb/hr. How many hours until 3,600 lb are used?

To determine how many hours it will take for a flight to consume 3,600 pounds of fuel at a rate of 450 pounds per hour, you can use the formula:

[

\text{Time} = \frac{\text{Total Fuel}}{\text{Fuel Consumption Rate}}

]

Substituting the values into the formula gives:

[

\text{Time} = \frac{3600 \text{ lb}}{450 \text{ lb/hr}} = 8 \text{ hr}

]

This calculation shows that it will take exactly 8 hours to use up 3,600 pounds of fuel at the rate of 450 pounds per hour.

The correct answer is thus based on accurately applying the formula for calculating time from total quantity and rate. The calculation confirms the fuel consumption rate aligns perfectly with the total fuel amount provided.