Answer:
[tex]\large \boxed{\text{4.5 mi/h}}[/tex]
Step-by-step explanation:
A unit rate is the number of something there is per one unit of something else.
In this question, the unit rate is the number of miles per one hour.
1. Convert minutes to hours
[tex]\text{time} = \text{10 min} \times \dfrac{\text{1 h}}{\text{60 min}} = \frac{1}{6} \text{ h}[/tex]
2. Find the unit rate
[tex]\begin{array}{rcl}\text{unit rate} & = & \dfrac{\text{miles}}{\text{hours}}\\\\& = & \dfrac{\frac{3}{4}\text{ mi}}{\frac{1}{6}\text{ h}}\\\\& = &\dfrac{3}{4} \times \dfrac{6}{1}\text{ mi/h}\\\\& = & \dfrac{3}{2} \times\text{3 mi/h}\\\\& = & \textbf{4.5 mi/h}\\\end{array}\\\text{The unit rate is $\large \boxed{\textbf{4.5 mi/h}}$}[/tex]
