The continent of North America has an area of approximately If the entire continent were...

The continent of North America has an area of approximately If the entire continent were evenly covered with Avogadro’s number of BBs (spherical projectiles 4.5 mm in diameter), how deep would the layer of BBs be? Hint: If spheres are randomly poured into a jar, the fraction of the jar’s volume occupied by spheres when the jar is “full” is about 65% if the diameter of the jar is large compared to the size of the spheres