What is a reasonable number for the age of O'ahu? (Ma means millions of years)

What is the ima of the 1 st class lever in the graphic given? 2 3 0.5

Use the periodic table to determine the electron configuration of dysprosium (dy) and americium (am) in noble-gas notation.

Transportation is the largest single source of air pollution in the united states. air pollution can harm the environment and human health. which technology could offer a solution to this problem? mufflers that reduce noise motors that run on electricity tires that improve gas mileage