Final answer:
Without the fuel efficiency rate and the correct distance, we cannot calculate the exact number of gallons needed for a Boeing 747 to travel a specified distance.
Step-by-step explanation:
The specific fuel consumption of a Boeing 747 or the amount of fuel needed to travel certain distances can be calculated if we know the fuel efficiency of the jet. However, the question lacks the essential information that would allow us to solve for the exact number of gallons needed to travel 4.00 x 10 km. Without the rate at which the plane consumes fuel (gallons per kilometer or miles per gallon), we cannot calculate how many gallons the aircraft will need for the trip. The question seems to contain a typo or an accidental omission regarding the distance (4.00 x 10 km does not specify the exponent). We would need to know the correct distance and the fuel efficiency of the aircraft to provide an answer to this question.