QQuestionMathematics
QuestionMathematics
"What is 0.29 km in mm? Report your answer with two significant figures.
A. 29000 mm
B. 290000 mm
C. 2900000 mm"
over 1 year agoReport content
Answer
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Step 1:Let's solve this step by step:
Step 2:: Understand the conversion between kilometers (km) and millimeters (mm)
- 1 km = 1000 m - 1 m = 1000 mm - This means 1 km = 1,000,000 mm
Step 3:: Set up the conversion calculation
0.29 \text{ km} \times \frac{1,000,000 \text{ mm}}{1 \text{ km}} = 290,000 \text{ mm}
Step 4:: Check significant figures
- The original number (0.29) has 2 significant figures - The answer should also be reported with 2 significant figures - 290,000 mm meets this requirement
Step 5:: Verify the multiple-choice options
- 290,000 mm corresponds to option B
Final Answer
Key insights: - Always convert between units by multiplying by appropriate conversion factors - Pay attention to significant figures in the original measurement - Use systematic conversion: km → m → mm
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