Radioactive decay can be described by the following equation In A = In Ag – kt where A, is the original amount of the substance, A is the amount of the substance remaining after time t, and k is a...

Extracted text: Radioactive decay can be described by the following equation In A = In Ag – kt where A, is the original amount of the substance, A is the amount of the substance remaining after time t, and k is a constant that is characteristic of the substance. For the radioactive isotope strontium-90, k is 2.47 × 10-2 years. If the original amount of strontium-90 in a sample is 50.8 mg, how much strontium-90 remains after 25.9 years have passed? |mg