Plz give me correct answers

Divide the following fractions 3/4 ÷ 2/3 1/2 8/9 9/8 2

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base

Aword processing program requires a 7- digit registration code made up of the digits 1,2,4,5,6,7 and 9 each number has to be used and no number can be used mor than once how many codes are possible