It’s 188.4
All you have to do is plug in 30cm into the formula for circumference :)
Let
be the constant factor between terms, so that


and so on, with

(notice how the exponent and the subscript add to
)
Then

so if

then

Now,

so the third term in the sequence is 30.
Answer:
A" (3,-3)
B" (4,-5)
C" (-1,-4)
Step-by-step explanation:
You already found the coordinates of A' B' C' so just use those points to do the translation.