Question

Identify the expression that does not belong and explain your reasoning:

5.25 • 10^7
(2.1 • 10^2)(2.5 • 10^5)
52.5 • 10^8
(2.1)(2.5) • 10^2+5

Answer 1

D does not belong  because the first 3 digits of the product of the first 3 equations is 525 and for D it is not.