Where can you find an online library catalog .

Why do you think electric energy for households is generally supplied by power plants instead of by an electric generator at home.

If (a, b) is the solution to the system of equations shown above, and a and b are integers, then what is the value of a+b?

Which statements about the two fossil images are correct? 1. cave bears are ancestors of plateosaurus. 2. plateosaurus were present on earth before ostracoderms. 3. ostracoderms were the first to die. 4. plateosaurus died after the ostracoderms. 5. cave bears are the oldest fossils.