To calculate the amount of carpeting Marissa needs, we first need to find the area of the guest room and then subtract the area of the closet since she does not want carpeting there.
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Calculate the area of the guest room:
- The dimensions of the guest room are 10 feet by 12 feet. \[ \text{Area of guest room} = \text{length} \times \text{width} = 10 , \text{ft} \times 12 , \text{ft} = 120 , \text{sq ft} \]
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Calculate the area of the closet:
- The dimensions of the closet are 4 feet by 3 feet. \[ \text{Area of closet} = \text{length} \times \text{width} = 4 , \text{ft} \times 3 , \text{ft} = 12 , \text{sq ft} \]
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Calculate the area to be carpeted:
- Subtract the area of the closet from the area of the guest room. \[ \text{Area to be carpeted} = \text{Area of guest room} - \text{Area of closet} = 120 , \text{sq ft} - 12 , \text{sq ft} = 108 , \text{sq ft} \]
Thus, Marissa needs to order 108 square feet of carpeting.
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