Question

Kory calculated several numbers in his calculator. The result displayed 1.3E-2 on the calculator screen. Which equivalent number(s) does this represent? 13 × 102 130 0.013 1.3 × 10-2 -0.013

Answer 1

1.3×10⁻² = 0.013

Explanation:

The "E" stands for "×10^", so 1.3E-2 means 1.3×10^-2.

Of course 10^-2 = 1/10^2 = 1/100 = 0.01, so

1.3E-2 = 1.3×10^-2 = 1.3×0.01 = 0.013

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This notation was used by early computers to print results where the character set was limited and superscripts could not be printed.