By definition, the number
is the ratio between the circumference and the diameter:

This implies that

And so your circumference is 
Answer:
480
Step-by-step explanation:
1200 times 0.4 equals 480
THE ANSWER WILL BE 3 BECAUSE I HAD DID MY MATH
Answer:
huh?
Step-by-step explanation:
Answer:
y = (1/4)x+3
Step-by-step explanation: