Final answer:
The numbers 13.5, 0.9, and 0.7 arranged from top to bottom in descending order are 13.5, 0.9, 0.7, which corresponds to answer option (d).
Step-by-step explanation:
The question involves arranging the numbers 13.5, 0.9, and 0.7 in order from top to bottom. To arrange these numbers, we should look at their value in relation to each other. The number 13.5 is larger than both 0.9 and 0.7. Among 0.9 and 0.7, 0.9 is larger. Therefore, the correct order from top (largest) to bottom (smallest) is 13.5, 0.9, 0.7. This corresponds to answer option (d), which lists the numbers in descending order.