What is 5 to the negative fourth power

You can write 5 to the negative fourth power as 5^ (-4). In cases, when you have negative power, you just have to put 5^4 in the denominator. So, instead of 5^ (-4), you have 1 / (5^4).

5^4 equals to 625.

In the last step you have to divide 1 by 625.

The result is 0.0016.

5*-5 = - 25*-5 = 125*-5 = - 625. Answer: - 625