.6% monthly correct? And 12 months right? .6*12=7.2
That leaves option b and C
We can rule B out with common sense. Is $10,000 gonna earn only $1,000 in 20 years? No
But algebraically shown here
10000(1.006)^(12*20) = 42025.74 Where 20 is T in time
This isn't rounding to 40,000 but it is farther away from $11,000 by a longshot