sat2物理A science teacher measures the length of her car to be 3.46 m.What is the margin of error in her measurement?(A) ± 0.001 m (B) ± 0.005 m (C) ± 0.01 m (D) ± 0.05 m (E) ± 0.06 m C is not the correct answer.You should have selected D.Expl

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sat2物理Ascienceteachermeasuresthelengthofhercartobe3.46m.Whatisthemarginoferrorinhermeasurement?(A)±0

sat2物理A science teacher measures the length of her car to be 3.46 m.What is the margin of error in her measurement?(A) ± 0.001 m (B) ± 0.005 m (C) ± 0.01 m (D) ± 0.05 m (E) ± 0.06 m C is not the correct answer.You should have selected D.Expl
sat2物理
A science teacher measures the length of her car to be 3.46 m.What is the margin of error in her measurement?
(A) ± 0.001 m
(B) ± 0.005 m
(C) ± 0.01 m
(D) ± 0.05 m
(E) ± 0.06 m
C is not the correct answer.You should have selected D.
Explanation
When reporting a measurement,the last digit is always uncertain,and can be off by as much as one-half the value of the second to last digit.In this case,the science teacher guessed the final 6,meaning that her car could really have a length anywhere between 3.41 m and 3.51 m.
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