A radioactive sample has a mass of 80 g initially and 50 g after 5 days
MATHEMATICS · Single correct · AP · Calculus AB · Differential Equations · Differential Equations
Problem
A radioactive sample has a mass of 80 g initially and 50 g after 5 days. Assuming exponential decay, how many days (from the start) will pass before the mass decreases to 20 g? (Answer to the nearest whole day.)
(a) 10days
(b) 20days
(c) 15days
(d) 12days