An exponent (power) indicates how many times a base number is multiplied by itself. Exponentiation appears in compound interest, scientific notation, computer storage, population growth, and virtually all quantitative sciences.
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Pro Tip
For quick mental powers of 2: memorise up to 2^10 = 1024. Then: 2^20 ≈ 1 million, 2^30 ≈ 1 billion, 2^40 ≈ 1 trillion.
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Did You Know?
If you folded a piece of paper in half 42 times, it would reach from Earth to the Moon. This is 2^42 ≈ 4.4 trillion thicknesses — exponential growth is mind-bending.
References
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