Scientific Notation and Significant Figures

• When it says to write your answers in the form:

Then it means put your answer in scientific notation!

Scientific Notation

ka 10 Zka ,101where

Scientific Notation

• 9 488 800 000 000 000• 9.48 x 1015

• 000 000 000 000 324• 3.2 x 10-13

.

.

You Do #1 Write 345, 239, 235 in scientific

notationA. 3.45 X 107 B. 3.45 x 108

C. 34.5 x 107

D. 3.45 x 10-8

[Default][MC Any][MC All]

.000 000 71

A. 7.1 x 10-9

B. 7.1 x 10-7

C. 71 x 10-8

[Default][MC Any][MC All]

5432.6; answer all that apply

A. 5.43 x 101

B. 5.4 x 103

C. 5.43 x 103

[Default][MC Any][MC All]

.325 671

A. 32.6 x 10-2

B. 3.26 x 10-1

C. 3.26 x 101

[Default][MC Any][MC All]

2.5 x 10-4

.000250.0

3.24 x 108

3240000000.0

Significant Figures • 43 620

• .036821

6 is the third significant figure. Look at 4th figure it’s < 5, so don’t change the 6. Make everything else zeros

3 sig figs -- 43600

8 is the third significant figure because the 0 in front is a place holder. look at the next digit. It’s < 5, so leave the 8. Leave off all

other numbers

3 sig figs .0368

Significant Figures • 10 076

• .203 513

0 is the third significant figure. The zeroes are significant, because it lies between two non-zero

digits. The digit behind the 0 is 5 or more, so round the 0 to a 1 and make all other places zeroes.

3 sig figs – 10 100

3 is the third significant figure. Look at the next digit. It is 5 or more, so round the 3 to a

4. Leave off all other numbers.

3 sig figs .204

Significant Figures

• 18.997

9 is the third significant figure. Look at the next digit. It is 5 or more, so round the 9 to a

0 and the 8 to a 9. Leave off all other numbers.

3 sig figs – 19.0

.008 6 [1]

.0090.0

523 [1]

5000.0

4.053 [3]

4.050.0

647 [2]

6500.0

3081 [2]

31000.0