# How do you write 4,730,000,000 in scientific notation?

$4.73 \cdot {10}^{9}$
$4.73 \cdot {10}^{9}$
Easy trick for scientific notation is to remember the first number (before the multiplication) has to be between 1 and 10, always. So you have $4 730 000 000$ can't be $473.0$ (too big), $47.3$ (too big) but $4.73$ fits right between 1 and 10, so that's good.