Answer:
about 60 cm
Step-by-step explanation:
hope this helps :p
It's a line in form y = mx.
Two points:
(0, 0) and (1, 4)
The formula of a slope:

Substitute:

Answer: 
There are 26 letters in the english alphabet, asussuming that they are all upper case, you would multiply 26×6 to find all of the different combinations of numbers.
there are 1000 possible ways to organize the nine individual numbers (000, 001, 002,...,999)
I hope that helps, I am not really sure how you would go on from there, good luck!