I believe it would be 7,000,000 + 500,000.
Answer:
Greywater is gently used water from your bathroom sinks, showers, tubs, and washing machines. It is not water that has come into contact with feces, either from the toilet or from washing diapers Greywater can also be used to irrigate vegetable plants as long as it doesn't touch edible parts of the plants.
Explanation:
Time distance decay
Hope it helps :)