When plumes of molten rock from the earth's interior form new crust on the surface and push plates away from each other, this creates a

Mid oceanic ridge

Explanation:

The formation of Mid-Oceanic Ridge gives rise to the formation of new crust on the ocean floor thus pulling apart the old ones.

the value of the 4 in the hundreds place is 400 while the value of th e 4 in the tens place is 40

400 is way bigger than 40.