QUIZ #2 - SIGNIFICANT FIGURES

How many significant figures are in 0.004560?
(Just numerical answer)

(Choose all that apply)

In the number 8.010

• The last zero is not a SF because it is a trailing zero

• The first zero is a SF because it is a trailing zero and decimal point is shown

• First zero is a captive zero, so it is a SF

• The last zero is a SF because it is a trailing zero and decimal point is shown.

1. Round 6.82349 to 3 significant figures.

1. Round 8 to 2 significant figures.

Calculate: 47.18 + 3.902
Write your answer rounded to 4 significant figures.

Calculate: 3.902 - 0.067
Write your answer rounded to 3 significant figures.

Estimate: 28.6 × 2.91
Round your answer to 2 significant figures.

• 84

• 56

• 90.

• 90

Estimate: 103.15 divided by 9.6
Round your answer to 3 significant figures.

• 10.

• 10.0

• 11.4

• 10

The length of a football field is 105.75 meters.
Estimate the length in feet, rounding to 4 SF

HINT:
1 m = 3.28 ft

• 105.75 m ≈ 300.0 ft

• 105.75 m ≈ 300 ft

• 105.75 m ≈ 400.0 ft

• 105.75 m ≈ 250.0 ft

A factory produces 4850 smartphones in a day.
Estimate how many smartphones it would produce in a year (considering 365 days), rounding to 1 SF

• around 2,000 Smartphones in a year are produced.

• around 15,000,000 Smartphones in a year are produced.

• around 2,000,000 Smartphones in a year are produced.

• around 20,000 Smartphones in a year are produced.