Question

how many significant figures does each number contain?
part 1 of 4
74.5:

significant figures

part 2 of 4
6500000:

significant figures

Explanation:

Part 1: 74.5

Step 1: Recall significant figure rules

Significant figures include all non - zero digits, and zeros between non - zero digits or after a decimal (if the number has a decimal). For 74.5, the digits 7, 4, and 5 are all non - zero and significant.

Step 2: Count the significant figures

We count the digits: 7, 4, 5. So there are 3 significant figures.

Step 1: Recall significant figure rules for whole numbers without a decimal

For a whole number like 6500000, the trailing zeros may or may not be significant. But the non - zero digits 6 and 5 are significant. The trailing zeros here are just placeholders (since there is no decimal to indicate that the zeros are significant).

Step 2: Count the significant figures

We count the non - zero digits: 6 and 5. So there are 2 significant figures.

Answer:

3

Part 2: 6500000