Question

describe how to write 3,482,000,000 in scientific notation

Answer 1

That is quite simply and astoundingly:

3.482 x 10^9

Answer 2

First move the decimal 9 places to the left to find 3.482, a number that is greater than or equal to 1 and less than 10. Then multiply 3.482 by 10^9, using an exponent on 10 that equals the number of places you moved the decimal. :)