The formula for r will be C/2π.
The radius of the yo-yo will be 6.02 feet.
It should be noted that circumference simply means the distance round the circle.
In this case, the circumference is given as 37.8 feet.
The formula is illustrated as:
C = 2πr
r = C/2π
The radius will be:
r = C / 2π
r = 37.8 / (2 × 3.14)
r = 37.8 / 6.28
r = 6.02
Therefore, the radius of the yo-yo will be 6.02 feet.
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