Answer
A $1.0 \times 10^{5}$
B $1.0$
C $4.5 \times 10^{-1}$
D $5.8 \times 10^{-1}$
Work Step by Step
A The appropriate number of significant figures would be two, since the numbers 320 and 0.080 have the least number of significant figures (two).
B The appropriate number of significant figures would be two, since the numbers 6.5 and 62 have the least number of significant figures (two).
C The appropriate number of significant figures would be two, since the number 4.9 has the least number of significant figures (two).
D The appropriate number of significant figures would be two, since the number 0.066 has the least number of significant figures (two).
