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As per an estimate, the depth D(t), in centimeter
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21 Feb 2024, 03:17
21 Feb 2024, 03:17
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63% (01:41) correct
36% (02:34) wrong based on 11 sessions
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As per an estimate, the depth D(t), in centimeters, of the water in a tank at t hours past 12:00 a.m. is given by \(D (t) = -10(t-7)^2+100\), for 0 ≤ t ≤ 12. At what time does the depth of the water in the tank becomes the maximum?
A. 5:30 a.m.
B. 7:00 a.m.
C. 7:30 a.m.
D. 8:00 a.m.
E. 9:00 a.m.
A. 5:30 a.m.
B. 7:00 a.m.
C. 7:30 a.m.
D. 8:00 a.m.
E. 9:00 a.m.
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Free Materials for the GRE General Exam - Where to get it!!
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Free Materials for the GRE General Exam - Where to get it!!
GRE Geometry Formulas
GRE - Math Book
As per an estimate, the depth D(t), in centimeter
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08 Jun 2024, 00:02
08 Jun 2024, 00:02
Expert Reply
Given: As per an estimate, the depth D(t), in centimeters, of the water in a tank at t hours past 12:00a.m. is given by \(D(t) = −10(t − 7)^2 + 100\), for 0 ≤ t ≤ 12.
Asked: At what time does the depth of the water in the tank becomes the maximum?
For maximum depth: -
d D(t) /dt = -20(t-7) = 0
t = 7
IMO B
Asked: At what time does the depth of the water in the tank becomes the maximum?
For maximum depth: -
d D(t) /dt = -20(t-7) = 0
t = 7
IMO B
gmatclubot
As per an estimate, the depth D(t), in centimeter [#permalink]
08 Jun 2024, 00:02
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