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Lee
Lee asked in Education & ReferenceHomework Help · 9 years ago

Help on math Exponential/half life problem (not looking for answer just guidance)?

The fraction of a lake’s surface covered by algae was initially 0.48 and

was halved (cut in half) each year since the passage of anti-pollution laws. How long

after the passage of anti-pollution laws was only 0.03 of the lake’s surface covered

with algae?

would it just be .48 (.5)^ t=.03 then solve for T

1 Answer

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  • Chris
    Lv 7
    9 years ago

    yes

    Proof:

    start = 0.48

    1st ½ life = 0.24

    2nd ½ life = 0.12

    3rd ½ life = 0.06

    4th ½ life = 0.03 QED

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