Every week Marcela deposits $45 in a bank account that she opened with an initial deposit of $250, so that after n weeks her balance (in dollars) is 250 + 45n. Her brother Ronnie withdraws $30 each week from his own bank account, which he opened with an initial deposit of $145, so that after n weeks his balance is 145 – 30n. Express the ratio of Marcela’s balance to Ronnie’s as a rational function, and simplify. a. fraction numerator 145 minus 30 n over denominator 250 plus 45 n end fraction b. fraction numerator 50 plus 9 n over denominator 29 minus 6 n end fraction c. fraction numerator 50 plus 3 n over denominator 29 minus 2 n end fraction d. None of these