Significant Figures

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Report the following to two significant figures
a. 3.1459
b. 6.003
c. 42
d. 6.0233 x 10^23
e. 14.456 + 3.87
f. 9.9999995 - 0.0108
g. 67.3 x 6.667
h. 4.93 / 3.946

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