Which of the following is the best estimated for the mass of all the people living on earth a. 2 x 10^8 b.1 x 10^9 c.2 x 10^10 d.3 x 10^11 e.4 x 10^12

True or false graphs must include scales that increase by the same amount

If we relied solely on the nonrenewable resources found in the u. s., which one would we run out of first at current usage levels? a. natural gas b. oil c. uranium d. coal

In order of decreasing light-transmitting capabilities of materials, which is the correct sequence? a. transparent -> translucent -> opaque b. opaque -> transparent -> translucent c. opaque -> translucent -> transparent d. translucent -> transparent -> opaque