What is the derivative of ∫(0 to x^2) (t^3 + 2t) dt?
+
What is the lateral area of a right circular cylinder with a radius of 3 units and a height of 5 units?
+
Math question: In a right-angled triangle, if one angle measures 30 degrees and the hypotenuse is 10 units long, what is the length of the side opposite to the 30-degree angle?