Answer:
12.686cm
Step-by-step explanation:
By using pythagoras, we can find CB.
We know that 
Therefore, 
(it has to be positive since it is distance)
now we look at triangle BCD and use SOH CAH TOA.

Answer:
first do 9x40 and get your answer then do 18x3 and get that answer and then add to do answers together
Answer:
I don't understand percentages
6,4 would be the write answer.