Courtney drives for 30 minutes at 50 mph
and for 1 hour at 40 mph. how far has he
traveled altogether?

Layers of rock containing fossils, like the layers illustrated here, are most likely composed of rocks.

What is the number of moles of chemical units represented by 9.03x10^24? and how do i show work? (dumb it down )

Which diagram shows the correct way to represent an ionic compound of magnesium oxide?