## Algebra: A Combined Approach (4th Edition)

$2,400 = 2.4 \times 10^3$
Move the decimal point until the number is between 1 and 10. $2,400.$ -> $2.400$ The decimal point is moved 3 places and the original number is 10 or greater, so the count is positive 3. $2,400 = 2.4 \times 10^3$