Question

zoey wants to use her computer tablet throughout a 6-hour flight. Upon takeoff, she uses the tablet for 2 hours and notices that the battery dropped by 33% from 100% to 67%. How many total hours can Zoey expect from the tablet on a full battery charge?

Answer 1

The number of hours expected from a full battery charge can be found

using a constant rate of change of battery level.

The number of total hours Zoey can expect from the tablet on a full battery

charge is $\underline{\mathrm{6. \overline{06} \ hours}}$.

Reasons:

The percentage of the initial charge on the battery = 100%

The percentage drop after she uses the battery for 2 hours = 33 %

Which gives;

33% ≡ 2 hours of battery use

$\mathrm{1\% \equiv \dfrac{2}{33} \ hours \ of \ battery \ use }$

$\mathrm{Full \ battery \ charge \ 100\% \equiv \dfrac{2}{33}\times 100 = 6.\overline{06} \ hours \ of \ battery \ use }$

The number of hours Zoey can expect from full battery charge = $\underline{\mathrm{6. \overline{06} \ hours}}$.

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