20 with an exponent of 2 means 20 squared, or 20 times 20, or 400. An exponent of 3 means 20 cubed, or 20 times 20 times 20, or 8000. The exponents work as they do for any other base.
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20 = 20^1 so for base 20, the exponent is 1. 20 = 10^1.3020 (approx) so for base 10, the exponent is 1.3010 20 = 2^4.3219 (approx) so for base 2, the exponent is 4.3219
An example is 2 . Because 200 = 1, therefore 1 is an exponent of 20. And 1 * 2= 2. If you mean x20, then still, 2 works. So conclusion: The most simple answer is 2
the exponent is a negative
you don't have a zero exponent in math.
If you mean 200, that is equal to 1. Any other number raised to the power zero is also 1. 00, however, is not defined.