Answer: The speed of Tatiana to the nearest mile per hour is 5.4 miles per hour.
Step-by-step explanation: Given that Tatiana ran a marathon with a average speed of 0,09 miles per minute.
We are to find her speed to the nearest mile per hour.
We know that
1 hour = 60 minutes.
According to the given information, we have
In 1 minute, Tatiana ran = 0.09 miles.
So, in 60 minutes, she ran = (0.09 × 60) = 5.4 miles.
Therefore, in 1 hour, she ran 5.4 miles.
Thus, the speed of Tatiana to the nearest mile per hour is 5.4 miles per hour.