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By unitary method, Marissa can hike 7/3 miles in an hour.
A single unit's value can be determined from the values of multiple units, and multiple units' values can be determined from the values of single units using the unitary method.
Given:
[tex]1\frac{3}{4}[/tex] = 7/4miles are hiked in 3/4 hours.
To find: the number of miles hiked in one hour
Finding:
By unitary method,
Miles hiked in 3/4 hours = 7/4
Miles hiked in 1 hour = 7/4(4/3) = 7/3
Hence, by unitary method, Marissa can hike 7/3 miles in an hour.
To learn more about unitary method, refer to the link: https://brainly.com/question/24587372
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