Answer:
7
Step-by-step explanation:
The circumference of a circle is given by
C = pi *d where d is the diameter
7 pi = pi *d
Divide each side by pi
7 = d
The diameter is 7
medium -11
I don't know about mean & mode
from what I remember ide say A
D, 196,608.
The sequence is multiplying by -4 every time.