Can someone help me I am stuck on this question it would mean the world if u helped me =) have a nice day!

What’s the scientific notation for the number 6,840,000,000

If the density of water is 1.0 g/cm3, which of these materials would float in water, based on their densities? check all that apply. aluminum cork iron lead wax

Geothermal energy for industrial use is available almost anywhere. a.true b.false