Final answer:
The formula =B3>=C3 returns TRUE because the date in cell B3 (1/1/2010) is after the date in cell C3 (12/31/2009).
Step-by-step explanation:
The result of the formula =B3>=C3 where cell B3 contains the date 1/1/2010 and cell C3 contains the date 12/31/2009 is TRUE. In Excel, this formula compares the two dates and checks if the date in cell B3 is greater than or equal to the date in cell C3. Since January 1, 2010 comes after December 31, 2009, the condition is met, and the result is TRUE.