Mathematics
OpenStudy (anonymous):

simplify (0.1)⁴

OpenStudy (agreene):

0.0001 or if you prefer: $\frac{1}{10000}$

OpenStudy (anonymous):

The reason for the answer is as follows. Something to the power of four is like multiplying that number four times over. So, in this case, you have 0.1 x 0.1 x 0.1 x 0.1. That comes out to 0.0001.