Final answer:
The expression A = 1200(1 + 0.075 × 3) can be simplified to A = 1200 × 1.225.
Step-by-step explanation:
The given expression A = 1200(1 + 0.075 × 3) can be simplified as follows:
A = 1200 × (1.225)
A = 1470
Therefore, the correct answer is option (a) A = 1200 × 1.225.