Use the following to answer question: 
-(Figure: Production Possibility Frontier for Tealand) Use Figure: Production Possibility Frontier for Tealand.Tealand is producing at point C on its production possibility frontier.What is the opportunity cost of increasing the production of tea from 20 million cups to 30 million cups?
Definitions:
Common Difference
The steady gap found between successive numbers in an arithmetic progression.
Common Ratio
In a geometric sequence, the consistent factor by which each term is multiplied to produce the next term.
Geometric Sequence
A geometric sequence is a sequence of numbers where each term after the first is found by multiplying the previous one by a fixed, non-zero number called the common ratio.
Common Ratio
In a geometric sequence, the constant factor by which each term is multiplied to get the next term.
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