We can't say, until we know what 'x' is.
8.643617379x1041
3
5 to the power of 8.
0.7143
5
0.5556
103 or 1000
625
One! As is anything divided by itself (except for zero which we really don't want to think hard about).
55=31253125.
7 to the third power or 343
10^5 or 10 to the 5th power
1.2
1.8
10 to the 5 th power
603.561886