Find the length of the curve for the interval 
Definitions:
Hypothesis
A proposed explanation made on the basis of limited evidence as a starting point for further investigation.
Participatory Action Research
A methodological approach in social research emphasizing collaboration between researchers and participants to solve a problem and effect real change.
Content Analysis
A research method involving analysis of texts.
Secondary Analysis
The use of existing research data to find new insights or to form new statistical analyses, without needing to perform data collection firsthand.
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