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21 April, 18:10

A deadly virus runs through the beetles in big city. If there are 1280 beetles in the city and every week 20% of them die, how many beetles remain after 6 weeks?

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Answers (2)
  1. 21 April, 18:25
    0
    Answer: 336 beetles remain after 6 weeks.

    Step-by-step explanation:

    If there are 1280 beetles in the city and every week 20% of them die, then the rate is exponential. The formula for determining the number of beetles left in the city after t weeks would be

    A = P (1 - r/n) ^nt

    Where

    A represents the number of beetles left after t years.

    P represents the initial number of beetles

    r represents the death rate of the beetles.

    n represents the periodic record of the death.

    t represents the number of weeks.

    From the information given,

    P = 1280

    r = 20/100 = 0.2

    n = 1 (recorded weekly)

    t = 6 weeks

    Therefore,

    A = 1280 (1 - 0.2/1) ^1 * 6

    A = 1280 (0.8) ^6

    A = 336
  2. 21 April, 18:28
    0
    Step-by-step explanation:

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