Significant Figures

What is the formula for calculating the area of a rectangle?

Area = length × width.

What was the area of the rectangle Jerod calculated?

44.85 m².

What is the significance of significant figures in measurements?

Significant figures indicate the precision of a measurement, including all certain digits plus one estimated digit.

How many significant figures does the measurement 43 mL have?

Two significant figures (4 and 3).

Explain how to read the volume in a graduated cylinder. What is the method?

Read the bottom of the meniscus and estimate between the marks.

How many significant figures does 36.5 mL contain?

Three significant figures (3, 6, and 5).

What are leading zeros in a measurement?

Leading zeros are zeros before the first non-zero digit and are never significant.

How many significant figures are in the number 106.1?

Four significant figures (1, 0, 6, and 1).

How many significant figures does the number 470,000 have?

Two significant figures (4 and 7).

What are trailing zeros? When are they significant?

Trailing zeros after a decimal point are significant if they are not just placeholders.

What is the correct number of significant figures in the volume calculation 1.2 cm × 1.0 cm × 1 cm?

The answer should have one significant figure.

What rule is followed when rounding numbers?

If the digit to be dropped is less than 5, round down; if greater than 5, round up.

How do you round 2.344 to three significant figures?

Round down to 2.34.

How should you round the number 1258 to three significant figures?

Round it to 1260.

How many significant figures are in the measurement 0.04?

One significant figure (4).

How many significant figures does 500 have?

One significant figure.

How many significant figures are in the measurement 1.50?

Three significant figures (1, 5, and the trailing 0).