Final answer:
The simple interest earned on $720 with an interest rate of 5% for 2 years is $72.
Step-by-step explanation:
To calculate the simple interest earned on $720 with an interest rate of 5% for 2 years, we can use the formula: Simple Interest = Principal x Rate x Time.
Substituting the given values into the formula, we have: Simple Interest = $720 x 0.05 x 2 = $72.
Therefore, the simple interest earned is $72. So the correct answer is option D) 72.