Answer:
About $733 billion will be spent at restaurants in 2015, if the trend continues.
Step-by-step explanation:
Since 2004, the amount of money spent at restaurants in a certain country has increased at a rate of 8% each year.
In 2004, about $390 billion was spent at restaurants and if this trend continues, then in the year 2015, the amount of money spent in restaurants will be
[tex]390(1 + \frac{8 \times (2015 - 2004)}{100}) = 733.2[/tex] billion dollars.
Therefore, about $733 billion will be spent at restaurants in 2015, if the trend continues. (Answer)