a Use the formula for compound interest to write a function for the balance in each bank at any time t Write a function for the balance in the first bank at any time t Choose the correct answer below OA A 15 000 1 06 6t OC A 15 450 E A 15 000 1 03 2t Write a function for the balance in the second bank at any time t Choose the correct answer below OA A 15 000 0 996 OC A 15 060 OE A 15 000 1 008 2t Balance thousands 25 10 6t 0 b Use a graphing utility to graph both functions in an appropriate viewing rectangle Based on the graphs which bank offers the better return on your money Graph both functions Choose the correct graph below The graph for the first bank is blue and the graph for the second bank is pink O A OB O C 10 Q Q Balance thousands 25 10 0 10 GLULE Q B A 15 000 1 01 OD A 15 000 0 03 t OF A 15 000 0 97 6t B A 15 000 1 004 12t OD A 15 000 1 048 OF A 15 000 0 004 24t Balance thousands 25 10 0 NHH 10 Q 12t Q OD Balance thousands 25 10 0 10 Q Q G