Question:
The area of a square is $5.29 \mathrm{~cm}^{2}$. The area of 7 such squares taking into account the significant figures is:
Correct Option: , 4
Solution:
(4) $A=7 \times 5.29=37.03 \mathrm{~cm}^{2}$
The result should have three significant figures, so
$A=37.0 \mathrm{~cm}^{2}$
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