This is a fairly simple question to answer, and just requires
establishing which number within 5,438,724,022. In this case, the number
that currently exists in the hundred million place is 400,000,000, so
to add 100,000,000 to this you will get 500,000,000. When returned into
your original number, you will get the answer of 5,538,724,022.
A is correct. The graph of the basic exponential function neither touches nor crosses the x-axis, whereas a linear function does cross over and can be negative for some inputs.
