looking at the section on scientific notation, when multiplying two numbers, such as 2.5x10³ and 4.3x10^5 you multiply the coefficients 2.5 and 4.3 but you add the exponents.
(2.5x10³) x (4.3x10⁵) = (2.5x4.3)x(10³x10⁵) = (2.5x4.3)x10³⁺⁵ = 10.75x10⁸=10.75x10⁹ why this so? explain