[Solved] Find the indicated angle or side. Give an exact answer. -Find the exact length of side \(a\). A) \(\sqrt { 61 }\) B) \(\sqrt { 73 }\) C) \(\sqrt { 13 }\) D) 1 Investment Spending: Expenditures on new physical assets like buildings, machinery, and equipment, contributing to future production capacity. GDP: Gross Domestic Product, a monetary measure of the market value of all final goods and services produced in a specific time period. MPC: Marginal Propensity to Consume, the proportion of additional income that a consumer spends on purchasing goods and services, rather than saving. GDP: Gross Domestic Product, the total value of all goods and services produced within a country's borders in a specific time period, indicating the size of its economy.