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what is a focal point in math. The word foci pronounced foe -sigh is the plural of focus. The center of activity or attention.
Either of two points on the axis of a mirror lens or other optical system on which rays converge or from which they deviate. The thing that everyone looks at or is interested in. The 40th and 20th percentile points are recommendations but not firm cutpoints.
Finding the focus of a parabola given its equation.
An academic concentration is the focal point of your undergraduate experience. It is an in-depth study centering on one or more disciplines a problem or theme or a broad question. The 40th and 20th percentile points are recommendations but not firm cutpoints. ˈfoʊkaɪ US.