Final answer:
The standard notation of 1.71×106 is simply writing out the number fully, which would be 1710000, corresponding to option a).
Step-by-step explanation:
The standard notation of 1.71×106 is the way to write the number without using an exponent. In this case, you multiply the decimal number 1.71 by 10 to the power of 6, which means you shift the decimal point 6 places to the right, filling in any empty places with zeros.
So, 1.71×106 becomes 1710000 in standard notation.
Therefore, the correct answer is a) 1710000.