The decay of 230 mg of an isotope is described by the function A(t)= 230e-0.031t, where t is time in years. Find the amount left after 26 years. Round your answer to the nearest mg.

The function is
A(t) = 230×e^(-0.031t)
A the amount left after 26 years ?
230 the current amount
E constant
-0.031 rate of decreases each year
T time 26 years

A (26)= 230×e^(-0.031×26)
A (26)= 102.72 round your answer to get 103

Hope it helps!