Question: Use the exponential decay model A = A 0 e kt to solve this problem. A radioactive substance has a half-life of 40 days. There

Use the exponential decay model A = A₀e^kt to solve this problem. A radioactive substance has a half-life of 40 days. There are initially 900 grams of the substance.

a. Find the decay model for this substance. Round k to the nearest thousandth.

b. How much of the substance will remain after 10 days? Round to the nearest hundredth of a gram.

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