Final answer:
To find 7% of 5.2a, convert 7% into a decimal (0.07) and multiply it by 5.2a, resulting in 0.364a; option d is correct.
Step-by-step explanation:
To find 7% of 5.2a, we first convert 7% into decimal form by dividing by 100, which gives us 0.07. Next, we multiply this decimal with 5.2a:
0.07 × 5.2a = 0.364a.
So, 7% of 5.2a is 0.364a, which corresponds to option d.