What is the lateral surface area of a cone with a radius of 5 units and a slant height of 13 units?
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Question: What is the derivative of ∫[a to x] f(t) dt, where f(x) = 3x^2 - 2x + 1 and a is a constant? (
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Math question: Solve the inequality system: -2x + 3y ≥ 6 and 2x + y < 9. Graph the solution on a coordinate plane. How many points lie within the solution?