What is the surface area of a cube with each side measuring 5 units?
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What is the average age of students in a class with 25 students, if the ages are 18, 20, 21, 18, 19, 22, 20, 19, 17, 21, 18, 20, 19, 22, 21, 20, 19, 17, 19, 20, 21, 19, 18, 20, 19?
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What is the equation of a logarithmic function that passes through the points (1, 2) and (4, 6)?