Math question: In triangle ABC, angle BAC measures 40 degrees. The bisector of angle BAC intersects BC at point D. If AD measures 6 cm, what is the length of BD?
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What is the domain and range of the logarithmic function f(x) = log x, and its natural logarithmic counterpart f(x) = ln x?
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What is the value of c in the constant function f(x) = c if f(x) is equal to 5 for all x, within the domain of real numbers?