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31 Mar 2021, 06:00
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Difficulty:
15%
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Question Stats:
86% (00:43) correct
14%
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wrong
based on 57
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Cost is expressed by the formula \(tb^4\). If b is doubled, by what factor has the cost increased?
(A) 2
(B) 6
(C) 8
(D) 16
(E) \(\frac{1}{2}\)
(A) 2
(B) 6
(C) 8
(D) 16
(E) \(\frac{1}{2}\)
hykhan
Current Student
Joined: 18 Dec 2020
Last visit: 04 Aug 2022
Posts: 87
Own Kudos:
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Location: Canada
Concentration: Healthcare, Entrepreneurship
Schools: Judge '23 (M$) INSEAD Aug 22 intake (A)
GMAT 1: 700 Q47 V39
GMAT 2: 720 Q48 V41
GPA: 2.8
WE:Project Management (Pharmaceuticals and Biotech)
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31 Mar 2021, 06:34
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If b is doubled, the new value is (2b). Taken to the fourth power, this results in a 2^4 or 16 fold increase in cost.
D
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D
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31 Mar 2021, 09:02
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Doubling tb^4= t (2b)^4
=16b^4
Thus 16
Answer option D
=16b^4
Thus 16
Answer option D
