1. Today in Algebra 2 Go over homework Notes: you will need a calculator –Scientific Notation Homework

2. Examples a)0.000000631 b)43,020,000,000 c)843,050,000,000,000 d)0.00000000924

3. Examples a)7.563  10 7 b)5.6204  10 –8 c)2.1340  10 –12 d)9.035  10 14

4. Arithmetic Final answer must be in scientific notation Examples a)5.6204  10 –8 + 1.305  10 –8 b)3.54  10 7 + 8.35  10 7

5. Practice a) (3.4507  10 8 )(2.61  10 4 ) b)(4.503  10 -3 )(3.21  10 5 )

6. Homework pg 259:46-57all, 59-63odd

7. Scientific Notation Used for very large or very small numbers, eliminates the need for writing a lot of zeroes. Example 7,532,000,000 is written as 7.532  10 9 Must have a number from 1 to 9 left of decimal, all remaining numbers are to the right. The exponent tells how many places the decimal is moved. Positive exponent means decimal was moved to the left, negative exponent decimal was moved to the right.