Significant figures

How many significant figures does the following number have?
0.00345

• 6
• 5
• 3
• Ambiguous: 3,4,5, or 6

How many significant figures does the following number have: 0.00204

• 6
• 4
• 3
• 2

• 5
• 3
• Ambiguous: 3 or 5

• 7

How many significant figures does the following number have: 100.00210

• 7
• 8
• 10
• Ambiguous: 7 or 8

Round 1289 to three significant figures

• 1290
• 130
• 1300
• 1.29x10³

What is 98.907 rounded to 1 significant figure?

• 98.9
• 90
• 100
• 1x10²

Solve and give your answer with the correct number of significant figures
(12.470)(271)

• 3366.9
• 3.37x10³
• 3400
• 3370

Solve and give your answer with the correct number of significant figures
129.6/3

• 43.0
• 43
•  4x10¹
• 40

Solve and give your answer with the correct number of significant figures
24.28 + 12.5

• 3.687 x 10¹
• 36.8
• 37
• 3.70x10¹

Solve and give your answer with the correct number of significant figures
1421-34

• 1.39x10³
• 1387
• 1390
• 1400