The kinetics of some phase transformations obey the Avrami relationship. Using the fraction transformed$-$time data given below, determine the total time required for the transformation to go to $91\%$ completion.

Fraction transformed $.$ Time

$0\mathrm{.}211\mathrm{.}9$

$0\mathrm{.}827\mathrm{.}9$

what's t in s$?$