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Ryan06202011

  • 3 years ago

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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  1. across
    • 3 years ago
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    Wow... those are very short buildings...

  2. Ryan06202011
    • 3 years ago
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    lol, right

  3. Ryan06202011
    • 3 years ago
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    i thought it would be C but i need a 2nd opinion

  4. across
    • 3 years ago
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    Use the Pythagorean theorem\[a^2+b^2=c^2,\]with \(a=3\) and \(c=8\).

  5. surdawi
    • 3 years ago
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    |dw:1349966096104:dw|

  6. surdawi
    • 3 years ago
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    \[x ^{2}=8 ^{2}-3 ^{2}=64-9\] \[x ^{2}=55\] \[\sqrt{x ^{2}}=\sqrt{55}\] x=7.4

  7. Ryan06202011
    • 3 years ago
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    thx

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