2% interest is the rate "r" but needs to be decimal form. r = 0.02
$400 is the principal amount P
because it's annual rate, n = 1
t = 6
A = 400(1+0.02)^(6)
A = 400(1.02)^(6)
A = 400(1.13)
A = 450.46
You just add 42,000 and 3,433.52 to get the answer, which is, 45,433.52
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Add sides 1
Subtract sides 12x
Divide sides by 2
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CHECK :
Thus the solution is correct .
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No (random words to reach 20 characters lol)