Element X is a radioactive isotope such that its mass decreases by 16% every year. If an experiment starts out with 710 grams of Element X, write a function to represent
the mass of the sample after t years, where the monthly rate of change can be found
from a constant in the function. Round all coefficients in the function to four decimal
places. Also, determine the percentage rate of change per month, to the nearest
hundredth of a percent.
Function: f(t) =