Final answer:
The recommended ramp length needed for the patient to access his house if there is a 2-inch vertical rise at the entrance of the house is 24 inches.
Step-by-step explanation:
The recommended ramp length needed for the patient to access his house can be calculated using the formula:
Ramp length = Vertical rise / Slope
Given that there is a 2-inch vertical rise at the entrance of the house, we can use this information to find the ramp length needed. Let's assume a slope of 1:12, which means for every 1 inch of vertical rise, the ramp should extend 12 inches horizontally. So, for a 2-inch vertical rise, the ramp should be 24 inches long. Therefore, the recommended ramp length needed is 24 inches.