8x 4 = 32
7-4 = 3
3x3 =9
8-3=5
5x 3 = 15/2 = 7.5
32+9+7.5 =48.5 cm
C/C' = .75
d = 3
C=pi x d = 3pi
C' = C/.75 = 4pi
Then since C' = 2r', r' =2
Answer:
The numbers slowly decrease by 4 so we can determine that the 40th sequence is -70.
Step-by-step explanation:
We have to find the period of the parent cosine function and the period of the function showed on the graph.
Period = 2π / B, where B is the coefficient of x - term.
1. For the function: y = cos x, B = 1
Period = 2 π / 1 = 2 π = 360°.
2. For the graphed function ( from the picture ):
Period = 6 π = 1,080°