Answer
4.939 $\times$ $10^{9}$
Work Step by Step
We need to write 4,939,000,000 as the product of a number greater than or equal to 1 and less than 10, and an integral power of 10.
The number greater than or equal to 1 and less than 10 will be 4.939
The decimal point has moved 9 places to the right, so the exponent of 10 will be 9.
So, 4,939,000,000 = 4.939 $\times$ $10^{9}$
