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33,000+ questions that adapt to you
Aniko finds the skills costing you points and picks your next question, with a tutor on hand.
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Take a test timed like the SAT, see your score and the skills that cost you points.
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A plan for your test date, daily sessions that adapt to you and a tutor on hand.
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Meet your daily minimum, climb your league and win prizes against students at your level.
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A circle has center OOO and circumference 120π120\pi120π. The rays OAOAOA, OBOBOB, and OCOCOC divide the circle into three consecutive sectors with central angles ∠AOB\angle AOB∠AOB, ∠BOC\angle BOC∠BOC, and ∠COA\angle COA∠COA in the ratio 1:2:31:2:31:2:3. What is the length of arc BCBCBC?
20π20\pi20π
40π40\pi40π
60π60\pi60π
80π80\pi80π
