-2.1 because each dash represents 0.1
Answer:
the largest is 620cm the next is 4.4 dam and the smallest is 0.52 km
He would need 6 meters of copper piping or just a tiny tincy bit more
Answer:

Step-by-step explanation:
There are a lot of other step that will be in between but the answer will end up being.....
Answer: Log (a^2c/ b^3 d^4)