Potassium-40 is useful for dating very old rocks because it has a(n) of 1.3 billion years.

Match the letters with the correct terms

Which of the following is not a reason why shenzhen, china, is considered an emerging global city

The pyramid has a square base that us inscribed in the circular base of the cone. draw an image of the composite shape of the base. 2) if the side length of the square base is 8 units long, what is the diameter of the circular base of the cone from the picture in number 1