Mathematics

Mathematics, 22.09.2019 04:30, major126

Aladder that is 21 feet long is propped against a building. the bottom of the ladder was placed 4 feet from the base of the building. how high up on the building does the ladder reach? round the answer to the nearest tenth of a foot.
a.4.1 feet
b.17.0 feet
c.20.6 feet
d.21.4 feet

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