Go To ALEKS Homepago ALEKS - Nathan Woller - Learn Exponential and Logarithmic Functions Finding the rate or time in a word problem on continuous exponential... The mass of a radioactive substance follows a continuous exponential decay model, with a decay rate parameter of $3.7 \%$ per day. Find the half-life of this substance (that is, the time it takes for one-half the original amount in a given sample of this substance to decay). Note: This is a continuous exponential decay model. Do not round any intermediate computations, and round your answer to the nearest hundredth. days
Solution
Step 1 ：The problem is about finding the half-life of a radioactive substance that follows a continuous exponential decay model, with a decay rate parameter of $3.7 \%$ per day.
Step 2 ：The half-life of a substance under exponential decay can be calculated using the formula \(T = \frac{ln(2)}{k}\), where \(k\) is the decay rate.
Step 3 ：In this case, the decay rate is given as $3.7\%$ per day, which needs to be converted to a decimal form for the calculation. So, \(k = 0.037\).
Step 4 ：We can substitute this value into the formula and calculate the half-life: \(T = \frac{ln(2)}{0.037}\).
Step 5 ：By calculating the above expression, we get \(T = 18.733707582701225\).
Step 6 ：Rounding to the nearest hundredth, we get the final answer: The half-life of the substance is approximately \(\boxed{18.73}\) days.
