Answer :
The answer in standard form for 2.13786 times 10^4 is 21,378,600.
To write a number in standard form, we need to express it as a product of a number between 1 and 10 and a power of 10. In this case, 2.13786 times 10^4 is already in scientific notation form, where the number before the "times" symbol is between 1 and 10, and the number after the "times" symbol is the power of 10.
To convert it to standard form, we move the decimal point four places to the right because the exponent is positive. This gives us the number 21,378,600.0. However, in standard form, we should remove the trailing zero after the decimal point, so the final answer is 21,378,600.
Among the options provided, option 3: 62,137,860,000 is the closest to the standard form of 21,378,600.
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