Move the decimal point to get a factor greater than 1 but less than 10..

The mean distance from Mars to the sun is about 141,750,000 mi. Write this number in scientific notation.

COURSE 2 LESSON 3-2

The mean distance from Mars to the sun is about 1.4175 108 mi.

141,750,000 = 1.4175 100,000,000 Write as a product of 2 factors.

= 1.4175 108Write 100,000,000 as a power of 10.

1 41,750,000.

3-2

Scientific Notation

Light from the sun reaches Earth in about

4.99012 102 s. Write this time in standard form.

COURSE 2 LESSON 3-2

Method 1

Method 2

= 499.012

The time is about 499.012 s.

4.99012 102 = 4.99012 100 Write as a product of 2 factors.

= 499.012 Multiply the factors.

3-2

Scientific Notation

4.99012 102 = 4.99012The exponent is 2. Move the decimal 2 places to the right.

Write in scientific notation.

1. 45,300 2. 714,900,000

Write in standard form.

3. 5.7 103 4. 6.034 106

COURSE 2 LESSON 3-2

4.53 104 7.149 108

5,700 6,034,000

3-2

Scientific Notation