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Ryan06202011 2 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

Wow... those are very short buildings...

2. Ryan06202011

lol, right

3. Ryan06202011

i thought it would be C but i need a 2nd opinion

4. across

Use the Pythagorean theorem$a^2+b^2=c^2,$with $$a=3$$ and $$c=8$$.

5. surdawi

|dw:1349966096104:dw|

6. surdawi

$x ^{2}=8 ^{2}-3 ^{2}=64-9$ $x ^{2}=55$ $\sqrt{x ^{2}}=\sqrt{55}$ x=7.4

7. Ryan06202011

thx

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