Question

the oldest volcanic rocks in the island of oahu in hawaii are dated to be 3 million years old. assume that the rate of movement of the pacific plate is 80 mm/year. based on the information provided, what is the distance of the island of oahu from the main island where volcanic activity is currently creating it. (type in your answer in kms)
1km = 10^6 mm
answer

Explanation:

Step1: Calculate the distance in mm

We know that distance \(d = v\times t\), where \(v = 80\) mm/year and \(t=3\times10^{6}\) years.
So \(d = 80\times3\times 10^{6}\) mm.

$$d=240\times10^{6}\text{ mm}$$

Step2: Convert mm to km

Since \(1\) km \( = 10^{6}\) mm, then \(d=\frac{240\times 10^{6}}{10^{6}}\) km.

Answer:

\(240\)