Example

3(r+2s)=2t-4
a⋅(b-2)=3b
3(r+2s)=2t-4
a⋅(b-2)=3b

Question

$$\frac{ 2.7 \times { 10 }^{ -3 } }{ 5.5 \times { 10 }^{ 4 } } =$$

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