Final answer:
Option 1: $168. The simple interest earned on $4000 in 3.5 years at an interest rate of 1.2% is $168.
Step-by-step explanation:
To calculate the simple interest earned, we can use the formula: I = P imes R imes T, where I is the interest, P is the principal amount, R is the interest rate, and T is the time period.
Given P = $4000, R = 1.2%, and T = 3.5 years:
I = 4000 imes 0.012 imes 3.5 = $168
Therefore, the simple interest earned on $4000 in 3.5 years at an interest rate of 1.2% is $168. Hence, option 1 is the correct answer.