The length of the vine wounded to the tree is 21 feet.
Circumference is the perimeter of a circular object. Therefore,
circumference = 2πr
where
The circumference of the tree is 3 feet. A vine was wound around 7 times .
The length of the vine can be calculated as follows:
Therefore,
circumference = 3 ft
length of the vine = 7 × 3
length of the vine = 21 feet
learn more on circumference here: https://brainly.com/question/15219938
#SPJ1