A skateboarder lands on all four wheels after riding a railing. If the skateboarder has a weight of 990 and the area on the bottom of a single wheel is 0.0005m^2, what pressure does the skateboard put on the ground?

Macy always thought there were only a few hair colors blonde brown and black however when she actually began looking around she saw varying shades of these hair color what is a possible reason for so many different hair colors