Since the slopes are equal they are parallel. I hope this helps.
Answer:

Step-by-step explanation:
<u>To figure this question out, you must follow the rule:</u>
Parenthesis
Exponent
Multiply
Divide
Addition
Subtraction
As you can see, the first operation in PEMDAS is Parenthesis.
Meaning the first thing you do is the numbers in parenthesis
Solve the question and go on from there like you were already doing.
Keeping in mind the formula for circumference is Pi x Diameter, you simply multiply 45 by pi.
This gives you 141.3716694