According to the Americans with Disabilities Act, a ramp can rise no more than 1 ft for every 12 ft of horizontal distance. What is the maximum angle that the ramp can form with the ground?

The ramp rises 1 ft for every 12 ft of horizontal distance, so the tangent of its angle is rise ÷ horizontal distance: tan(θ) = 1/12. Taking the inverse tangent gives θ ≈ 4.8°. Therefore, the maximum angle is 4.8º, choice A.

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