2. What is scientific notation? a compact way of writing very large and very small numbers useful in seeing the magnitude of a number at a glance useful in astronomy, chemistry, and other sciences

3. Scientific Notation A number is written in scientific notation when it is in the form a x 10n where 1 ≤ a < 10 and n is an integer.

5. Try some: 8654.32 8.65432 x 103 .00346 3.46 x 10-3 .00002013 2.013 x 10-5 54179.82 5.417982 x 104

6. And in reverse . . . Express each number in ordinary notation: 8.0032 x 104 80,032 3.76 x 10-6 0.00000376 4.602 x 105 460,200 6.415 x 10-3 0.006415

7. Using a scientific calculator Look for a key that says EE or EXP To multiply: (5.2 x 102)(8.6 x 104) Type: 5.2 “EE” 2 x 8.6 “EE” 4 Get: 4.472 07 (which is 4.472 x 107)

8. Turn to page 215 Do 1-8