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saul85 [17]
3 years ago
12

All of the following are rational except Sqrt 0.49 Sqrt 19 Sqrt 900 Sqrt 100

Mathematics
2 answers:
klasskru [66]3 years ago
4 0
0.49 is the correct answer
Anna71 [15]3 years ago
3 0

Answer:

0.49

Step-by-step explanation:

for it to be rational there should not be no decimal nor pi .

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\stackrel{\textit{perimeter of the semi-circle, with }r=\frac{y}{2}}{P_{semic}=\cfrac{\pi y}{2}}~\hfill \stackrel{\textit{area of the semi-circle with }r=\frac{y}{2}}{A_{semic}=\cfrac{\pi y^2}{8}}
\\\\[-0.35em]
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\bf \stackrel{\textit{perimeter of the enclosure}}{60=2x+y+\cfrac{\pi y}{2}}\implies \stackrel{\textit{multiplying by 2}}{120=4x+2y+\pi y}
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\bf \stackrel{\textit{area of the enclosure}}{A=xy+\cfrac{\pi y^2}{8}}\implies A=\left( \cfrac{120-2y-\pi y}{4} \right)y+\cfrac{\pi y^2}{8}
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