The audio version of this article is generated by AI-based technology. Mispronunciations can occur. We are working with our partners to continually review and improve the results. Barbara Havrot says ...
How many fifth-graders in the U.S. took the AP Calculus AB exam last year? Radu Rosu of Chapel Hill wanted to find the answer. He knew of one child who did - his 10-year-old son, Paul Rosu, who earned ...
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