Find the moment of inertia about the z-axis of a thin funnel in the shape of a cone 
if its density function is 
Definitions:
Return On Investment
A measure used to evaluate the efficiency or profitability of an investment, calculated as the net profit of the investment divided by its initial cost.
Invested Capital
The total amount of money that has been invested in a company by shareholders and debt holders, used for operational and capital expenditure purposes.
Performance Over Time
The tracking and analysis of an entity's performance metrics through different periods to gauge progress or decline.
Average Assets
The average value of a company's assets over a specific period, calculated to give insight into how assets are being utilized over time.
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