Translating a graph upwards just means adding or subtracting a value from the initial function.
So to push a graph up, you just add (+) the number of units onto the original function.
Answer:
12.5
Step-by-step explanation:
All I really did was divide the circumference by pi to get the diameter which you end up dividing it by two to get the radius.
Step-by-step explanation:

123 - Use PEMDAS but since you have both division and multiplication you can just go from left to right