Perform each of the appropriate problems with and without use of a calculator and compare your answers. Don't forget significant figures in your answers.
  1. Convert each of the following quantities into scientific notation and round to 3 significant figures:
    а)
    b) 0.00018680
    c) 0.0000043835
    d)
  2. Perform each of the following calculations as indicated:
    a)
    b)
    c)
    d)
    e)