Based on the figure shown below, approximately how many times more luminous is a main-sequence star having a radius of 10 RSUN than a star having a radius of 1 RSUN? 
Definitions:
Kohlberg
A theorist known for his work on the development of moral reasoning in individuals, categorizing this development into stages.
Preindustrial societies
Societies characterized by an economy based on agriculture, with limited technological development and a predominance of subsistence farming.
Kohlberg's dilemmas
Moral dilemmas used by Lawrence Kohlberg in his research to study moral reasoning and the development of moral judgment across different stages of human life.
Cross-cultural studies
Research aimed at comparing cultural practices, values, and psychological processes across different cultures to understand cultural influences on behavior and cognition.
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