Question 7 of 10 How did the singer Justin Bieber launch his career?
O A. By posting performances on the Internet
O B. With a viral video of him on the street
C. With a once-homeless radio personality
D. By playing gigs at community events

Geothermic gradient is the rate of increasing temperature with respect to increasing the depth in the earths interior. away from tech tonic plates boundaries, it is about 25-40 c/km (72-87 degrees f/mi) of depth near the surface in most of the world.

F=31 because you subtract 39-8