Final answer:
Joan reduced the table's original price of $48 by 1/6, calculating a markdown of $8. Subtracting this from the original price gives a final sale price of $40 (D).
Step-by-step explanation:
The question involves determining the final sale price of a table after a markdown. Joan originally wanted to sell the table for $48 but decided to reduce the price by 1/6 on her dad's advice. To find the final sale price, calculate the markdown amount by dividing the original price by 6 ($48 ÷ 6 = $8). Then, subtract the markdown from the original price to get the final sale price ($48 - $8 = $40).
Therefore, the final sale price of the table is $40 (D).