Algebra Math problem?

Modeling using exponential functions

1. There were 12 rats in a deli. in 2 months there were 48 rats in the deli. If the rat population continues to increase at this rate how many rats will be in the deli in 6 months?

2. A radioactive substance has a half life of 2 seconds. If you start with 1000 mg how much of the substance will be left after 20 seconds?

Comments

  • 1. 12 rats

    2 months = 36 new rats

    1 month = 18 month

    36 + 18 = 3 months

    54 + 18 = 4 months

    72 + 18 = 5 months

    90 + 18 = 6 months

    108 rats

    2. 1000 after 2 seconds = 500

    after 4 seconds = 250

    after 6 seconds = 175

    after 8 seconds = 87.5

    after 10 seconds = 43.75

    after 12 seconds = 21.875

    after 14 seconds = 10.9375

    after 16 seconds = 5.46875

    after 18 seconds = 2.734375

    after 20 seconds = 1.3671875

  • 1. 2985984

    i think that is the answer tell me if im wrong

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