Is this problem is about solving for h? If it is, here is the answer:
I got 3,487.49 when i solved it out
The answer is 9 because 9 to the second power is 81 and 81*9 = 729 :)))
i hope this is helpful
have a nice day
If m1 and m2 are the slopes of each line, for them to be perpendicular you gotta solve
m1 * m2 = -1