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The value of a $20,000 car decreases every year, t. the equation below models this sitution: 20000(1 - 0.04t) = 13,000.

Please explain how to work this problem.

  • math -

    Multiply each term within the parenthesis by 20000 and solve for t:

    20000 - 20000*0.04t = 13000.
    -800t = 13000 - 20000.
    -800t = -7000.
    Divide both sides by -800:
    t = -7000 / -800 = 8.8 Years.

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