It is given that he spent 8 dollar in 1 second.
ExplanationTo determine the days he spent in 1 billion dollar.
[tex]\begin{gathered} 8\text{ dollar =1 sec.} \\ 1dollar=\frac{1}{8}sec \\ 1000,000,000dollar=\frac{1}{8}\times1000,000,000sec \end{gathered}[/tex]There are 125,000,000 seconds required for spend 1 billion dollar.
Convert into days.
1 days =86400 seconds.
[tex]\begin{gathered} 86400sec=1\text{ days} \\ 1sec=\frac{1}{86400}days \\ 125,000,000=\frac{125,000,000}{86400}days=1446.76days \end{gathered}[/tex]AnswerHence the number of days required to spent 1 billion dollar is 1447 days.