What is the thickness of the patio slab given in feet if it is 5 inches thick?

To convert the thickness of the patio slab from inches to feet, it's important to know that there are 12 inches in a foot. Given that the slab is 5 inches thick, you would perform the conversion by dividing the thickness in inches by the number of inches in a foot:

5 inches ÷ 12 inches/foot = 0.4167 feet.

When rounding this figure to two decimal places, it approximates to 0.42 feet. While this value may seem closest to the choice provided labeled as B, it is more accurate to note that the closest representation of this value given the options presented is actually a misalignment since none of the options perfectly match.

However, understanding this conversion is crucial, as it demonstrates the importance of accurate mathematical conversions in measuring materials appropriately for construction purposes. A 5-inch slab is fundamentally 0.4167 feet thick when calculating to align with standardized measurements typically used in construction and building specifications.