Please help me idk this

Answer:
47.1
Step-by-step explanation:
Circumference =2pie radius
radius=1/2 diameter=7.5
2(7.5)3.14=47.1
Answer:
C =47.1 inches
Step-by-step explanation:
The circumference of a circle is given by
C = pi*d where d is the diameter
C = 3.14 *15
C =47.1 inches