81 because each person has 9 people to greet and there’s 9 people so 9x9=81
Answer:
Explanation:The Biosphere-Atmosphere Interactions focuses on the sources and sinks of greenhouse gases (GHGs), air pollutants, particulate matter, water, and energy between the Earth's surface and the atmosphere.
I mean there are many ways to work a rubix cube maybe try watching videos and practising
I think he just became fascinated mkay
