What is the general form of the exponential function that represents growth and decay, and what are the key characteristics of two specific exponential functions f(x) = 10^x and f(x) = e^x?
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What is the value of 5 to the power of 3, minus the square root of 81, multiplied by 4?
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What is the area of a triangle with sides 5 cm, 12 cm, and 13 cm, using Heron's formula?