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To convert from meters to millimeters, we multiply by 1,000.
The width of the sticky note is 1.25 x 10^(-8) meters. When we multiply by 1,000, we get 1.25 x 10^(-8) x 1,000 = 1.25 x 10^(-8) x 10^3 = 1.25 x 10^(-5) millimeters.
The length of the sticky note is 2.5 x 10^(-6) meters. When we multiply by 1,000, we get 2.5 x 10^(-6) x 1,000 = 2.5 x 10^(-6) x 10^3 = 2.5 x 10^(-3) millimeters.
Therefore, the dimensions of the sticky note in millimeters are 1.25 x 10^(-5) by 2.5 x 10^(-3) millimeters.
The correct answer is 1.25×10^−5 by 2.5×10^−3 millimeters.