8

7

5

3

10 20 .4

10 0.3 .3

10 27.8 .2

10 1.34 .1

Warm-up Decide whether the number is in scientific notation. If not, write the number correctly.

correct

41078.2 , no6103 , no

9102 , noWrite in decimal form.

610 1.3 .5 0000013.Write in scientific notation.

564,200 .6 510642.5

Math II

UNIT QUESTION: What methods can be used to find the inverse of a function?Standard: MM2A2, MM2A5

Today’s Question:How do exponent rules apply to operations with scientific notation?Standard: MM2A2.a

4.1 Scientific Notation

Multiplyingand

Dividing

Multiplying and Dividing

To multiply, divide, or find powers of numbers in scientific notation,use the properties of exponents.

Use the properties of exponents.Example 1: Evaluate

)105.5)(103.2( 31 65.12

310265.1

Multiply these together.

Use the rules of exponents.

210

Not scientific. We will move it to the left once,

so we ADD one.

Use the properties of exponents.Example 2: Evaluate

3

1

104.1

1082.1 3.1

Divide these.

Use the rules of exponents.

210

Use the properties of exponents.Example 3: Evaluate

31)100.2( 30.2

Share the exponent.

3103100.8

Use the properties of exponents.Example 4: Evaluate

7

10

101.3

106.5 806.1 310

1994in person

per calls local 1806

In 1994 the population of California was about 3.1 x 107. In that year about 5.6 x 1010 local calls were made in California. Estimate the number of local calls made per person in California in 1994.

Homework Day 1

Page 111 #9-17

Homework/Class work Day Homework/Class work Day 22

Text: page 110 #9-27 (odd)

Workbook: p. 117 #25-32