Area of a circle
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find the area of a circle with a radius of 8.
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In the surface area formula for cylinders which expressionrepresents the lateral area

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

Which approach to the theory-and-research cycle does the following sequence reflect: (1) specific observations suggest generalizations, (2) generalizations produce a tentative theory, (3) the theory is tested through the formation of hypotheses, and (4) hypotheses may provide suggestions for additional observations?