To calculate the speed of Monique the green turtle in centimeters per minute, we can use the formula for speed:
\[ \text{Speed} = \frac{\text{Distance}}{\text{Time}} \]
In this case, the distance is 250 centimeters and the time is 8.7 minutes.
Now we can plug in the values:
\[ \text{Speed} = \frac{250 , \text{cm}}{8.7 , \text{min}} \approx 28.738 , \text{cm/min} \]
Now rounding this value to the nearest tenth:
\[ \text{Speed} \approx 28.7 , \text{cm/min} \]
So the green turtle’s speed as a unit rate is approximately 28.7 centimeters per minute.