The time that elapses until half the element remains is__ years. It is expecting me to use Intersect on a graphing calculator to find the answer. I don’t know how to do this and I don’t have the correct calculator.

The example for this problem says to use y sub 2=0.5. The function I found to be graphed is y=32-22e^-0.066890232x
(x is the t in the half life formula). I hope this makes sense.
Thanks for the help!