Converting 8 miles to kilometers
To answer this question, we need to have the conversion factor for miles to kilometers as follows:
Now, if we have 8 miles, we can proceed as follows:
![8\text{miles}\cdot\frac{1.61\operatorname{km}}{1\text{mile}}=8\cdot(mile)/(mile)\cdot1.61\operatorname{km}]()
Therefore, we have:
![8\cdot1.61\operatorname{km}=12.88\operatorname{km}]()
If we round this result to the nearest tenth, we finally have that the final answer is 12.9km.
Converting 1.5 kilometers into miles
We know that:
![1\operatorname{km}\approx0.62miles]()
Therefore, if we have 1.5 km, we can proceed as follows:
![\begin{gathered} 1.5\operatorname{km}\cdot\frac{0.62\text{miles}}{1\operatorname{km}}=1.5\cdot\frac{\operatorname{km}}{\operatorname{km}}\cdot0.62\text{miles} \\ 1.5\cdot0.62\text{miles}=0.93\text{miles} \end{gathered}]()
If we round the result to the nearest tenth, we have that 1.5 kilometers are approximately 0.9 miles.
Converting 9 kilometers to miles
We can proceed similarly:
![\begin{gathered} 9\operatorname{km}\cdot0.62\frac{miles}{\operatorname{km}} \\ 9\cdot0.62\cdot\frac{\operatorname{km}}{\operatorname{km}}\cdot miles\Rightarrow\frac{km}{\operatorname{km}}=1 \\ 5.58\text{miles} \end{gathered}]()
If we round the result to the nearest tenth, we have that 9 kilometers are approximately 5.6 miles.
Converting 3.1 miles into kilometers
We can proceed as follows:
![\begin{gathered} 3.1\text{miles}\cdot\frac{1.61\operatorname{km}}{1\text{mile}} \\ 3.1\cdot(mile)/(mile)\cdot1.61\operatorname{km} \\ 4.991\operatorname{km} \end{gathered}]()
If we round the result to the nearest tenth, we will end up with 5.0km.
In summary, we have that - rounded to the nearest tenth:
• 8miles is approximately 12.9km
,
• 1.5km is approximately 0.9miles
,
• 9km is approximately 5.6miles
,
• 3.1miles is approximately 5.0km