a: \(54.11\simeq54.1;6.95\simeq7.0;26.15\simeq26.1\)
=>\(A=\dfrac{54.1\cdot7}{26.1}=14.4541\)
b: \(A=\dfrac{54.11\cdot6.95}{26.15}=\dfrac{376.0645}{26.15}\simeq14.3810\simeq14.4\)
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