Act like it's a whole circle and find the perimeter, then divide by 2.
P = 2 * pi * r
P = 2 * 3.14 * 9
P = 56.52
Now divide by 2:
P = 28.26
C. the addition property of equality
65 trillion can be written as
65,000,000,000,000
or as
6.5 x 10¹³ .
The general equation of the sine function y=f(x) is defined as

where A is the Amplitude
B represents the frequency of the function with period equals 
C represents the Horizontal shift, For Phase shift= -C/B
D represents the Vertical shift.
The data given that the amplitude of the function A=6

Vertical shift 
Horizontal Shift 
Now plug in
in the general equation of sine function, we get
