6. Найди координату точки D, отмеченной на числовом луче. Запиши в поле ответа верное число.

The number line shows 0 and 30. There are two equal segments between 0 and 30. The point D is located at the first tick mark after 0. Therefore, each segment represents 30 / 2 = 15 units. The coordinate of point D is 0 + 15 = 15.