The following Excel scatterplot with the fitted quadratic regression equation illustrates the observed relationship between productivity and the number of hired workers. 
For which value of Hires is the predicted Productivity maximized? Note: Do not round to the nearest integer.
Definitions:
Critical Thought
The objective analysis and evaluation of an issue in order to form a judgment.
Religious Beliefs
Convictions or faith in specific religious principles, deities, or doctrines that guide individuals' thoughts and actions.
Critical Rationalists
Philosophers or thinkers who emphasize the importance of critical scrutiny and rational argument in the pursuit of knowledge.
Contrary Evidence
Information or data that challenges or contradicts a particular belief, hypothesis, or theory.
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