Answer: 91,445,760 ft³
Step-by-step explanation:
You know that the base of this pyramid is a square, then you can use the following formula to calculate its volume:
[tex]V=\frac{s^2h}{3}[/tex]
Where "s" is the lenght of any side of the base of the pyramid and "h" is the height of the pyramid.
You know that:
[tex]h=480ft\\s=756ft[/tex]
Then, you can substitute these values into the formula. So, you get that the volume of The Great Pyramid is:
[tex]V=\frac{(756ft)^2(480ft)}{3}=91,445,760ft^3[/tex]