a. 18 [tex]m^2[/tex]
b. 674 m
c. 4220 [tex]seconds^2[/tex]
Significant figures operation
When performing division or multiplication operations, the significant figure of the final answer is determined by the participating number with the lowest significant figure.
If the operation is subtraction or addition, the significant figures after the decimal of the final answer should be the same as that of a participating number with the least significant figure.
Thus;
8.3 m x 2.22 m = 18 [tex]m^2[/tex] (the least has 2 significant figures)
8432 m divide 12.5 = 674 m (the least has 3 significant figures)
35.2 seconds x 120 seconds = 4220 [tex]seconds^2[/tex] (the least has 3 significant figures)
More on significant figures can be found here: https://brainly.com/question/14359464
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