A projectile is able to orbit the Earth at what speed?

about 8000 m/s

It so happens that the vertical distance that a horizontally launched projectile would fall in its first second is approximately 5 meters (0.5*g*t2). For this reason, a projectile launched horizontally with a speed of about 8000 m/s will be capable of orbiting the earth in a circular path.

answer; the correct answer is ( north and west );