Answer:
h=123,200
Explanation:
First you must in the formula for the pyramid, which is

and as far as the question has gave us 
V=18069333.33333 
LW=440
1.) Plug those numbers into the the equation, which should be:

2.) Then isolate the "h" by dividing both sides by 
 , or multiplying its reciprocal, which is
, or multiplying its reciprocal, which is 


3.) Simplify or round the numbers if you need to.
