(Solution) - A constant current of 3 A for 4 hours is -(2025 Original AI-Free Solution)

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A constant current of 3 A for 4 hours is required to charge an automotive battery. If the terminal voltage is 10 + t/2 V, where t is in hours,
(a) How much charge is transported as a result of the charging?
(b) How much energy is expended?
(c) How much does the charging cost? Assume electricity costs 9 cents/kWh?