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Describe the three sources of internal heat of the terrestrial planets?
Proportion
Proportion refers to the relative relationship in size, amount, or degree between two or more things, often expressed as a ratio or fraction.
Discretionary Income
What remains of someone's earnings for savings, investment, or other expenses after settling tax obligations and necessary personal expenses like shelter and food.
Property Taxes
Taxes levied by local government on real property (land and buildings), based on assessed value, to fund municipal services like schools, roads, and public works.
Cost of Living
A measure of the average cost necessary to cover basic expenses such as housing, food, taxes, and healthcare in a certain place and time.
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