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8. (2 pts) Suppose a 21-foot ladder is leaning against a building, reaching to the bottom of a thirdoor window 15 feet above the ground.

8. (2 pts) Suppose a 21-foot ladder is leaning against a building, reaching to the bottom of a thirdoor window 15 feet above the ground. What angle, in radians, does the ladder make with the building? (You need to use a calculator.)

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