Sig figs and scientific notation

Round 9563.28 to 1 significant figure

• 9

• 9000

• 10000

• 9000.0

Round 8.249 to 2 significant figures

• 8.2

• 8.0

• 8.3

• 8.25

Round 89.95 to 3 significant figures

• 90

• 90.0

• 89.9

• 89.0

Round 0.05098 to 2 significant figures

• 0.050

• 0.0050

• 0.059

• 0.051

Round 29.23 to 1 significant figure

• 2

• 20

• 30

• 30.0

Round 808094.2 to 4 significant figures

• 808100

• 808010

• 808090

• 808000

How many significant figures are in the number 0.0045?

• 1

• 4

• 2

• 5

Answer explanation

Leading zeros are never significant. Non-zero numbers are always significant.

Round the number 24,934 so it has 3 significant figures.

Answer explanation

We want 3 sig figs. KEEP 2, 4, and 9. Since 3<5, round DOWN. So 24,934 --> 24,900.

The number 1.0300 has ____ significant figures.

Answer explanation

Zeros between 2 non-zero numbers are always significant. Trailing zeros that DO NOT show where the decimal point is are always significant.

How many significant figures does the number 0.00460 have?

• 5

• 3

• 2

• 6

Answer explanation

Leading zeros are never significant. Trailing zeros that DO NOT show where the decimal point is are always significant. Non-zero numbers are always significant.