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10. Algebraically determine how long, to the nearest tenth of a month, it takes the smartphone to be worth $601.

10. Algebraically determine how long, to the nearest tenth of a month, it takes the smartphone to be worth $601.

Advanced Engineering Mathematics
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Use the following information to answer the next question. A new smartphone can be purchased for $840. The phone's value has a half-life of 23 months and can be modelled by the function V = 840(0.5)5 where V is the value of the smartphone, in dollars and t is the elapsed time, in months. 10. Algebraically determine how long, to the nearest tenth of a month, it takes the smartphone to be worth $601.
Transcribed Image Text:Use the following information to answer the next question. A new smartphone can be purchased for $840. The phone's value has a half-life of 23 months and can be modelled by the function V = 840(0.5)5 where V is the value of the smartphone, in dollars and t is the elapsed time, in months. 10. Algebraically determine how long, to the nearest tenth of a month, it takes the smartphone to be worth $601.
8. Which of the following is equivalent to 12* = c-4? A. log, 12 = c– 4 B. log(c-4) 12 = x C. log,, (c-4) =x D. log,, (x)=c-4 Use the following information to answer the next question: The pH of a solution is defined by the equation pH =-log H* where the concentration of hydronium ions, H", in a solution is measured in moles per litre. 9. Determine algebraically the pH of a solution that is 50 times less acidic than vinegar, which has a pH of 2.5.
Transcribed Image Text:8. Which of the following is equivalent to 12* = c-4? A. log, 12 = c– 4 B. log(c-4) 12 = x C. log,, (c-4) =x D. log,, (x)=c-4 Use the following information to answer the next question: The pH of a solution is defined by the equation pH =-log H* where the concentration of hydronium ions, H", in a solution is measured in moles per litre. 9. Determine algebraically the pH of a solution that is 50 times less acidic than vinegar, which has a pH of 2.5.
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