What is the average weight (in kg) of 20 students in a class if their weights are: 48, 55, 50, 53, 56, 48, 54, 51, 59, 52, 56, 50, 53, 57, 49, 52, 56, 58, 55, 51?
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Question: Find the area of a triangle with side lengths 5, 12, and 13 using Heron’s formula.
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Question: Convert 0.0000523 to scientific notation.