A 10-foot ladder is placed 4 feet from the edge of a building. How far up the building does the ladder reach. Round your answer to the nearest tenth of a foot.

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Respuesta :

Answer:

a = 9.2

Step-by-step explanation:

a^2+4^2= 10^2

a^2 + 16 = 100

a^2 = 84

a = 9.2