What is the proper set-up for the equation to determine the rate at which the islands are sinking, as asked in question 12 of the lab manual on page 71? Choose the correct option:
a) rate = difference in elevation of Maui and Nihoa b) rate = elevation of Maui divided by elevation of Nihoa c) rate = elevation of Nihoa divided by elevation of Maui d) rate = sum of elevations of Maui and Nihoa