What is a phase I will give brainliest

Phase means each of the aspects of the moon or a planet, according to the amount of its illumination, especially the new moon, the first quarter, the full moon, and the last quarter. Similar words that almost or also means phase are appearance, stage, form, point, and state.

After 9 years:

7,680

Step-by-step explanation:

4%=0.04

1 year = 12,000 x 0.04=480

9 years= 480 x 9 = 4320

12,000-4320= 7,680