what are the values of 2.3 x 10^-10, 3.2 x 10^-10, 2.3x10^-12, and 2.3x10^-8

The values of the given numbers are:

2.3 x 10^-10 = 0.00000000023
3.2 x 10^-10 = 0.00000000032
2.3 x 10^-12 = 0.0000000000023
2.3 x 10^-8 = 0.000000023