EARTH SCIENCE

refer to figure 3. Part A:  (Magnetic anomalies at mid-ocean ridges). Using the pattern of seafloor magnetic anomalies (stripes) and the timescale of magnetic reversals to the right, calculate the average rate at which point A has moved away from the ridge axis since 5 Ma ?

A. 16 km/my

B. 36 km/my

C. 55 km/my

D. 80 km/my

E. 120 km/my

F.160 km/my

Part B: Refer to Figure 3 (Magnetic anomalies at mid-ocean ridges). Using the pattern of seafloor magnetic anomalies (stripes) and the timescale of magnetic reversals to the right, calculate the average rate at which point A has moved away from point B since 5 Ma ?

A. 32 km/my

B. 64 km/my

C. 80 km/my

D. 110 km/my

E. 120 km/my

F. 160 km/my

g. 240 km/my

FIGURE 3 link