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8/3 mph since Hadley paddled 2/3 miles in 1/4 hours, you have to try to figure out how much Hadley paddled in 1 hour. From there, you figure out that you multiply 4*2/3,( because 1/4*4=1hour) Hope this helped!

The above question can be solved using the formula for Speed.

Hadley is paddling at 2 2/3 miles per hour

The formula is given as:

Speed = Distance (miles) / Time (hours)

From the question:

Distance = 2/3 mile

Time = 1/4 hour

Hence: 2/3 mile / 1/4 hour

= 2/3 x 4/1

= 8/3 (mile/ hour)

= 2 2/3 miles/ hour

Therefore, Hadley is paddling 2 2/3 miles per hour

To learn more, visit the link below:

https://brainly.com/question/19787956