Step 1: Calculate the total surface area of the marshmallow. The surface area of the pentagon is given by the formula \( A = \frac{5}{2} \times \text{side}^2 \). Assuming the side of the pentagon is 7 centimet, the surface area is \( A = \frac{5}{2} \times 7^2 = 14 + 5 \times 49 = 14 + 245 = 259 \text{ cm}^2 \). Step 2: Since 1 \( cm^2 \) of marshmallow is covered by 0.5 ml of chocolate, đồ sộ cover the entire surface area of the marshmallow, we need \( 259 \times 0.5 = 129.5 \text{ ml} \) of chocolate. Step 3: James has 1.5 liters of melted chocolate, which is \( 1.5 \times 1000 = 1500 \text{ ml} \). Step 4: Divide the total amount of chocolate by the amount needed for one marshmallow đồ sộ find out how many marshmallows can be covered: \( \frac{1500}{129.5} \approx 55.5 \). Step 5: Since we cannot have a fraction of a marshmallow, we round down đồ sộ the nearest whole number, resulting in 55 marshmallows. Therefore, James can completely cover 55 marshmallows with 1.5 liters of melted chocolate.