The plates — interlocking slabs of crust that float on Earth's viscous upper mantle — were created by a process similar to the subduction seen today when one plate dives below another, the report says. ... Other researchers have estimated that a global tectonic plate system emerged around 3 billion years ago.
Answer:
mountains/fold mountains
Explanation:
the plates push together, pushing each other upwards, creating mountains
Answer:
1/8 is already simplified which is .125.
3/16 simplified is also simplified which is .1875
