1-7 할리데이 10판 솔루션 일반물리학

$$ \begin{aligned} & \Ans \\=& 70.0\ut{mi/h} \cdot 1.00\ut{year} \\=& \frac{70\ut{mi}}{1\ut{h}} \cdot 1\ut{year}\cdot \frac{365.2422\ut{day}}{1\ut{year}}\cdot\frac{24\ut{h}}{1\ut{day}} \\=& \frac{70\cdot 1\cdot 365.2422\cdot 24}{1\cdot 1\cdot 1}\ut{mi} \\=& \frac{76700862}{125}\ut{mi} \\=& 613606.896\ut{mi} \\ \approx& 6.14\times10^{5}\ut{mi} \end{aligned} $$