Which best describes the process of smelting? A. It removes ore from the ground and has minimal impact on the environment.

B. It extracts metal from ore and it is very harmful to the environment.

C. It removes particles from a water source and has minimal impact on the environment.

D. It produces steam that generates electrical power and it is very harmful to the environment.

in scientific notation, the value of the  speed of light in a vacuum

  will be written as 2.995 * 10^8. when this value is represented in the form of

  a * 10^b, then, a = 2.995 and b = 8.

the value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. in this case, the scientific notation will be written as 3 *10^8.

it is b that is the answer.