How do i solve this with work ..? i’m extremely confused

According to modern science, earth is about 4.5 billion years old and written human history extends back about 10,000 years. suppose the entire history of earth is represented with a 10-meter-long timeline, with the birth of earth on one end and today at the other end.

Acircle has a radius of 5/6 units and is centered at (3.6, 7.8) write the equation of this circle

Solve each quadratic equation by factoring and using the zero product property. n^2 - 49 = 0