Approximately 2.81 × 1 0 21 electrons flow through the electric device in 30 seconds when a current of 15.0 A is delivered. This is calculated using the relationship between current, charge, and the charge of a single electron. The total charge that flows is 450 C, leading to the calculation of the number of electrons.
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The Community Reinvestment Act (CRA) evaluates bank performance through lending, investment, and service tests. The combination of these tests assesses how effectively banks meet the credit needs of their communities. Therefore, the answer is A: Lending, investment, and service tests. ;