A radioactive substance decays exponentially. A scientist begins with 110 milligrams of a radioactive substance. After 29 hours, 55 mg of the substance remains. How many milligrams will remain after 4

A radioactive substance decays exponentially. A scientist begins with 110 milligrams of a radioactive substance. After 29 hours, 55 mg of the substance remains. How many milligrams will remain after 47 hours.