NEED HELP ASAP!!!!
A sample of 600 g of radioactive lead-210 decays to polonium-210 according to the function A(t) = 600e ^-0.032t, where t is time in years. Find the amount of radioactive lead remaining after
(a) 4yr
(b) 8 yr
(c) 10yr
(d) find the half-tie
round to the nearest integer as needed.
