Answer:
7
Explanation:
to find the circumference of a circle the equation is C=πd where C is circumference, d is diameter, and using 3.14 for π
once we plug in the known information we are left with
22=(3.14)d
all that's left is to solve for d
22=(3.14)d
22/3.14=(3.14)/3.14 d
7=1d
7=d