I have no idea what this means; maybe somebody can clarify. The correct answer is 0.625 ml: volume is area (25 mm²) * height (25 mm), making 625 mm³, 0.625 cm² (ml), or 0.000625 dm² (litres).
Seattle gets on average about 37.07 inches of rain per year. The rainy season officially starts on October 1st, and lasts all throughout winter and the beginning of spring.