What is 4E10 plus 2E12?

Answer 1

To add (4 \times 10^{10}) and (2 \times 10^{12}), it's helpful to express them with the same exponent. Converting (2 \times 10^{12}) to the same exponent as (4 \times 10^{10}) gives (200 \times 10^{10}). Now, adding them together results in (4 \times 10^{10} + 200 \times 10^{10} = 204 \times 10^{10}), which can also be expressed as (2.04 \times 10^{12}).