Final answer:
The original price to arrive at the sale price of $29.40.
Step-by-step explanation:
To find the sale price of the sandals originally priced at $42 with a 30% discount, calculate the amount of the discount first by converting the percentage to a decimal and multiplying it by the original price. In this case, $42 times 30% (or 0.30) equals $12.60. This is the discount amount.
Next, subtract the discount amount from the original price to find the sale price: $42 - $12.60 equals $29.40. This is the sale price of the sandals to the nearest cent.