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What is the result of adding (2.5 × 103) + (3.5 × 102)? A. 6.0 × 103 B. 2.85 × 103 C. 6.0 × 105 D. 2.85 × 105
(2.5 × 103) + (3.5 × 102) = 614.5 . A. =618 B. =293.55 C. =630 and D. =299.25. So it would be none of the choices.
Expert answered|sharpies|Points 4037|
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Asked 10/7/2011 8:49:39 AM
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How many significant digits are in the number 340? A. 1 B. 2 C. 3 D. 0
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What is the density of a block whose dimensions are 2.45 cm × 3.2 cm × 4.078 cm and whose mass is 2.86 kg? A. 89 g/cm3 B. 89.5 g/cm3 C. 89.45 g/cm3 D. 89.455 g/cm3
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Updated 10/5/2011 3:11:01 PM
2 Answers/Comments
answer is C. 89.45 g/cm3 solution volume=2.45 cm × 3.2 cm × 4.078 cm=31.97 cm3 density= mass / volume =2860 g/ 31.97 cm3 = 89.45 g/cm3
Added 10/5/2011 3:10:53 PM
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What is the measurement 222.008 mm rounded off to four significant digits? A. 222 mm B. 222.0 mm C. 222.01 mm D. 220 mm
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Updated 10/7/2011 8:30:21 AM
1 Answer/Comment
222.008 mm rounded off to four significant digits is B. 222.0.
Added 10/7/2011 8:30:21 AM
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