Final answer:
After withdrawing $50 from an initial balance of $10, Sara's bank account balance would be -$40, suggesting an overdraft situation.
Step-by-step explanation:
The bank account balance question asked by the student is a simple subtraction problem in the subject of Mathematics. To find Sara's account balance after she withdraws $50, you need to subtract the withdrawal amount from her starting balance. Sara begins with $10 in her bank account. After withdrawing $50, the equation to find her new balance would be:
Starting Balance - Withdrawal = New Balance
$10 - $50 = -$40
Therefore, Sara's account balance after the withdrawal would be -$40, assuming the bank allows an overdraft. This calculation falls under the elementary concepts of arithmetic, specifically dealing with positive and negative numbers.