Ryan06202011
A ladder is propped up 3 feet away from the side of a building. The length of the ladder is 8 feet. What is the height of the building? Round to the nearest tenth.
A. 8.5 ft
B. 7.4 ft
C. 7.6 ft
D. 9 ft
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across
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Wow... those are very short buildings...
Ryan06202011
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lol, right
Ryan06202011
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i thought it would be C but i need a 2nd opinion
across
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Use the Pythagorean theorem\[a^2+b^2=c^2,\]with \(a=3\) and \(c=8\).
surdawi
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|dw:1349966096104:dw|
surdawi
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\[x ^{2}=8 ^{2}-3 ^{2}=64-9\]
\[x ^{2}=55\]
\[\sqrt{x ^{2}}=\sqrt{55}\]
x=7.4
Ryan06202011
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thx