A radioactive substance decays exponentially. A scientist begins with 200 milligrams of a radioactive substance. After 16 hours, 100 mg of the substance remains. How many milligrams will remain after 29 hours?
For this case we have the following exponential equation: y = A (b) ^ t Where, A: initial amount b: decrease rate t: time in hours We then have to rewrite the equation for this problem: y = 200 * (0.5) ^ ((1/16) * t) For t = 29 hours we have: y = 200 * (0.5) ^ ((1/16) * 29) y = 56.93943174 mg Answer: It will remain 56.94 mg after 29 hours
