1/256.
http://wiki.answers.com/Q/What_is_4_to_the_negativ...

1. Change the power to which 10 is being raised from negative to positive. For example, in the expression 10^3, 3 would be the power, so you would change it to 3. 2. Multiply 10
http://www.ehow.com/how_7803291_calculate10negat...

When solving for 2 to the negative fourth power, or 2^4, the solution is
http://www.chacha.com/question/whatistwotothe...

remember this: any number to the minus 1 power is the same as 1 divided by the number so 10^1 = 1/10 and 10^4 = 1/(10^4) = 1/10000 = 0.0001 or 10^4 = (1/10) ^4 = = 1/10 * 1/10
http://answers.yahoo.com/question/index?qid=200702...
