2.51 x 10^8 is written in scientific notation already.
4.35 x 10 to the eighth power
The value is 8 because the exponent written in scientific notation is 2.45x10^8, which means 2.45 times 10 to the eighth power.
That is in standard notation. In scientific notation, it would be 9 times 10 to the eighth power
9.452 times 10 to the negative eighth power in standard notation is written as: 0.00000009452
2 to the 64th power is written as 2*1064 in scientific notation.
If it is written in scientific notation it will have x10 to a certain power if it is standard it won't
In scientific notation, this number can be written as 5.77 x 10 to the 6th power.
In scientific notation it is 1.57821*10^5 and so it is 10 to the power of 5
9.1136 x 10^8
50,010 to the power of 3 in scientific notation = 1.25075015001 x 10^14
64.3 times 10 to the power of -8 in scientific notation is written as: 0.000000643