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30 December, 18:02

Wally is playing with his toy robot. The robot's battery is 80% full when he starts playing with it. The battery drains to 74% after Wally plays with the robot for 40 minutes. If t represents the time elapsed in minutes and l represents the battery level, which of the following equations can be used to model this situation?

A. l = - 0.15 + 80t

B. l = - 0.15t + 80

C. l = 80t + 0.15

D. l = - 0.15t - 80

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Answers (1)
  1. 30 December, 18:24
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    The answer is D.

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