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Which of the following is equal to
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12 Jan 2023, 10:10
12 Jan 2023, 10:10
1
Expert Reply
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Question Stats:
90% (00:27) correct
9% (00:29) wrong based on 11 sessions
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Which of the following is equal to \(\sqrt{81+169}\)
A. \(5 \sqrt{10}\)
B. 22
C. 25
D. \(25 \sqrt{2}\)
E. \(25 \sqrt{5}\)
A. \(5 \sqrt{10}\)
B. 22
C. 25
D. \(25 \sqrt{2}\)
E. \(25 \sqrt{5}\)
GRE Prep Club Team Member
Joined: 20 Feb 2017
Posts: 2506
Given Kudos: 1055
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Re: Which of the following is equal to
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14 Jan 2023, 11:28
14 Jan 2023, 11:28
2
Expert Reply
Carcass wrote:
Which of the following is equal to \(\sqrt{81+169}\)
A. \(5 \sqrt{10}\)
B. 22
C. 25
D. \(25 \sqrt{2}\)
E. \(25 \sqrt{5}\)
A. \(5 \sqrt{10}\)
B. 22
C. 25
D. \(25 \sqrt{2}\)
E. \(25 \sqrt{5}\)
\(\sqrt{81+169}\)
= \(\sqrt{250}\)
We know the square root of 16 = 256 hence the answer will be equal to something little less than 16.
Answer: A
Re: Which of the following is equal to
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26 Dec 2023, 20:55
26 Dec 2023, 20:55
1
another way, once you see sqrt(250), you know thats the same as sqrt(25*10). 25 is 5^2, so you can take 5 out of the sqrt you have 5sqrt(10)
