The ramp needs to be 10 feet long and 2 feet high. How far from the building will the base of the ramp be? Also, calculate the cost of concrete for the base if it requires $⁢10 per foot.

The ramp, wall, and ground form a right triangle. Using the Pythagorean theorem, the base distance is √(10² − 2²) = √96 ≈ 9.8 feet. At $10 per foot, the concrete costs about 9.8 × $10 = $98, so the correct choice is 9.8 feet and $98.

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