How many significant figures are represented by the following number that is written in scientific notation?
2.5 ×
A)0
B)1
C)2
D)3
E)none of the above

Question

How many significant figures are represented by the following number that is written in scientific notation? 
2.5 × 
A)0 
B)1 
C)2 
D)3 
E)none of the above

Quizplus · Accepted Answer

The number given in scientific notation is 2.5 × 10^(71d6_7894_d0fe_91e5_0d3f1de7f05b_TB6110_11). In scientific notation, the coefficient (the number before the "times ten to the power of" part) should only include significant figures. In this case, the coefficient is 2.5, which has two significant figures. The exponent does not affect the significant figures in the coefficient, so the answer is C) 2.

How Many Significant Figures Are Represented by the Following Number