Express answer in scientific notation

Question

In a state with a population of 2,000,000 the average citizen spends $6,000 on housing each year. What is the total spent on housing for the state? Express answer in scientific notation.

Answer 1

2,000,000 can be written in scientific notation as 2x10⁶

$6,000 can be written in scientific notation as $6x10³

2x10⁶ citizens x $6x10³/citizen =  $12x10⁹ = $1.2x10¹⁰ spent (or $1x10¹⁰ total amount spent with correct sig figs)