SOLUTION: Could you possibly verify that these 3 Physical Science problems are correct? The answers to these problems must be rounded to the correct number of significant figures. Prob

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Question 1163359: Could you possibly verify that these 3 Physical Science problems are correct?
The answers to these problems must be rounded to the correct number of significant figures.
Problem 1.....90.0 kg * 0.518 kg = 59.482 Kg
Problem 2.....47.5 cm * 12.1 cm * 0.45 cm = 258.6375 cm3 rounded to 258.64 cm3
Problem 3.....481.6 km divided by 5.6 h = 86 km/h
If I have done any of these incorrectly due to significant figures, please indicate I made errors - below is how I calculated.
On Problem 1 the least numbers of significant figures is 3 (.518)
On Problem 2 the least numbers of significant figures is 2 (0.45)
On Problem 3 the least numbers of significant figures is 2 (5.6)
Thank you in advance for verifying the 3 problems above.
Answer by ikleyn(52803) About Me  (Show Source):
You can put this solution on YOUR website!
.

Problem 1.   Calculation is incorrect.  It should be redone.



Problem 2.    Correct.



Problem 3.    Correct.



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Comment from student: Thank you so much for quick response. On Problem 1 I made mistake - it should be 90 kg - 0.518 kg = 89.482
Could you verify that this subtraction problem above is correct? Thanks so much
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My response :   This simple arithmetic is done correctly.