In the figure below,what is the approximate depth of the asthenosphere? 
Definitions:
Infrastructure
The fundamental physical and organizational structures and facilities needed for the operation of a society or enterprise.
Loans
Borrowed funds that must be repaid, usually with interest, used by individuals or entities to finance various activities or purchases.
Economic Growth
refers to an increase in the production of economic goods and services, compared from one period of time to another, typically measured by GDP.
DVCs
Digital Video Cameras, which are devices used to capture video in a digital format. If not related to digital video cameras, DVCs could be referring to a term not recognized without further context.
Q19: A _ wave is a type of
Q20: The deep,flat ocean floor is known as
Q27: _ is the extremely slow downslope granular
Q27: Rocks closer to the spreading centers in
Q33: An instrument that measures and detects vibrations
Q35: The reptilian fossils that Wegener used to
Q43: The deepest hole ever drilled in the
Q45: The sloping land at the edge of
Q52: _ refer to the product attributes which
Q72: Metamorphism commences at approximately 300°C.