contestada

An object is traveling at steady speed of 9 4 /5 kilometer per hour how long will it take the object to travel 2 1/5 km first round the nearest integer to find the estimated answer then find the exact answer.

Respuesta :

[tex]\begin{gathered} 9\cdot\frac{4}{5}=\frac{49}{5}=9.8 \\ 2\cdot\frac{1}{5}=\frac{11}{5}=2.2 \end{gathered}[/tex]

9.8km------------------------------------->1h

2.2km------------------------------------->xh

[tex]\begin{gathered} \text{Let's use cross multiplication:} \\ \frac{9.8}{2.2}=\frac{1}{x} \\ \text{solve for x:} \\ x=\frac{2.2}{9.8}=\frac{11}{49}h \\ x\approx13\min \\ x=\frac{660}{49}\min \end{gathered}[/tex]