I dont get it LOL but im doing this too so maybe you can help me too?
Answer:
7 millimeters
Step-by-step explanation:

i got 180x + 9 but idk if it is the correct answer
Answer:
e.g., if there are 30 units, they may try to use up all the two-digit numbers, ... 9. 984 10 139. 5543 11 5. 6 12 669. 2 13 77. 60 14 08. 1 15 244. 9 16 55..
Step-by-step explanation: there lemmie know if you need anymore help God bless!
Answer is 215 R (Remainder) 18