Improved Answer:
If you mean: 8.35*10^4 then it represents 83,500 in scientific notation
3.56 to the power of 4.
63x10 to the power of 4
It is: 7.84*10-4
0.000473 in scientific notation is 4.73 x 10^-4
1.2*10^-4 is in scientific notation and it is equivalent to 0.00012
6.34 to the negative 4 power
8.1*10(to-the-power-of)4
1.68 X 10 to the -4 power
6.412 x 10 to the -4 power
1.7061 x 10 to the 4 power
the power is-3
43*10^-4 (43 times 10 to the power of -4)