To find the unit price of a 10-ounce bottle of ketchup that sells for $1.59, you can divide the total price by the number of ounces.
Unit price = Total price / Number of ounces
Unit price = $1.59 / 10 ounces
Unit price = $0.159 per ounce
To express this in cents, multiply by 100:
Unit price in cents = $0.159 × 100 = 15.9 cents per ounce.
Rounding this to the nearest cent gives you approximately 16 cents per ounce.
So the correct answer is 16¢ per ounce.