Please help immediately! also don't use a link to a website

Answer:
Step-by-step explanation:
the radius is half the diameter:
7/2 : 2 = 7/2 x 1/2 = 7/4 cm
the circumference is:
diameter x π = 7/2π cm
the approximate circumference is
7/2 x 3,14 = 10,99 cm