Final answer:
To calculate the number of months and the final payment for Rashid's bicycle, divide the total cost by the combined monthly payment. They would make 9 full payments and a final 10th payment of $15.35 each. It appears there is a discrepancy in the provided choices.
Step-by-step explanation:
The student is asking how many months Rashid and his mother would have to make payments for Rashid's new bicycle that cost $480.70, with each of them paying $25 each month. To find out how many months it would take, we divide the total cost of the bicycle by the combined monthly payment from both Rashid and his mother ($25 each, so $50 per month). $480.70 divided by $50 equals 9.614, which means they would need to make payments for 9 full months, with a partial 10th month. Therefore, the answer is that they would make 9 full payments of $25 each and a final 10th payment, where each would pay half of the remaining balance. The remaining balance would be $480.70 - (9 months * $50) = $480.70 - $450 = $30.70. Thus, the final payment each would make is $30.70 / 2 = $15.35. However, since this option is not available in the provided choices, it seems there was a miscalculation in the problem statement.