(2.5 x 10⁷) (8 x 10⁵)
The product of (2.5 x 10⁷) and (8 x 10⁵) can be calculated by multiplying the numerical parts and adding the exponents of the powers of 10.
The numerical part of the product is 2.5 x 8 = 20.
The exponent of the power of 10 is obtained by adding the exponents, which is (7 + 5) = 12.
Thus, the product is 20 x 10¹².
In scientific notation, this can be written as 2.0 x 10¹³ or simply 2.0E+13.