Question

The half-life of a substance is how long it takes for half of the substance to decay or become harmless (for certain radioactive materials). The half-life of a substance is 8.6 days and there is an amount equal to 15 grams now. What is the expression for the amount A(t) that remains after t days, and what is the amount of the substance remaining (rounded to the nearest tenth) after 37 days?

Answer 1

general half-life equation

A(t) = (starting amount)(0.5)^(number of days/half-life in days)

plug in the appropriate values to find A(t)