When Sanchez left his house this morning, his cell phone was 30% charged and it then started to lose 3% charge for each hour thereafter. Write an equation for the function B (t), representing the charge remaining in Sanchez's battery, as a percentage, t hours after he left his house.

Question

Mathematics

Steven

19 June, 12:30

When Sanchez left his house this morning, his cell phone was 30% charged and it then started to lose 3% charge for each hour thereafter. Write an equation for the function B (t), representing the charge remaining in Sanchez's battery, as a percentage, t hours after he left his house.

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Answers (1)

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Carl Vaughan · Answer 1

The equation that represents the battery charge in Sanchez's phone as a percentage t hours after he left his house is B (t) = 30 - 3*t.

Step-by-step explanation:

The initial state of the battery on Sanchez's phone is 30% so in time t equals zero the battery should be at that value and as time progresses the battery should lose battery charge at a rate of 3% for each hour. We can write this in an equation form by taking the initial state and subtract it by the rate multiplied by the value of time. We have:

B (t) = 30 - 3*t

The equation that represents the battery charge in Sanchez's phone as a percentage t hours after he left his house is B (t) = 30 - 3*t.