The mathematical constant, e, also referred to as Euler's number, is equal to 2.718 (and many more decimals). This value is the real number such that the value of the derivative of the function f(x)=ex at the point x=0 is equal to 1.
2.72
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5E-5 is scientific notation representing the number 5 multiplied by 10 raised to the power of -5. This can be expanded to 0.00005 in standard decimal notation. The "E" in 5E-5 stands for exponent, indicating the number of decimal places the decimal point should be moved to the left (negative exponent) or right (positive exponent).
21
The most accurate calculation of pi is currently estimated to be around 31.4 trillion decimal places. This calculation was achieved using supercomputers and advanced mathematical algorithms. However, for most practical purposes, using pi to just a few decimal places (3.14159) is sufficient.
The Roman numerals of IX or VIIII are both equivalent to 9
The most precise and mathematical answer is the IA stands for I Answered.