Answer:
D (option 4)
Step-by-step explanation:
amplitude = 5
Period 12 means the multiple of x should be
2pi/12 = pi/6
b=20
C=160
160+b= 180 (sum of angle on the straight line)
b=180-160
b+c =180 (sum of angle on the straight line)
20+c=180
c=180-20
61,500
8200 x 6.5 = 53,300 + 8200 = 61,500 = $61,500
