2. (a) (b) The weight of a radioactive substance remaining after t years is given by -0.04t W=1000x2 grams. 1 Show that t= - log₂ ( 0.04 W 1000 Hence or otherwise, find the time required for the weight to reach (II) 0.001 grams. (I) 20 grams
2. (a) (b) The weight of a radioactive substance remaining after t years is given by -0.04t W=1000x2 grams. 1 Show that t= - log₂ ( 0.04 W 1000 Hence or otherwise, find the time required for the weight to reach (II) 0.001 grams. (I) 20 grams
Chapter6: Exponential And Logarithmic Functions
Section6.7: Exponential And Logarithmic Models
Problem 15TI: Cesium-137 has a half-life of about 30 years. If we begin with 200 mg of cesium-137, will it take...
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