A highly unstable element has a half-life of 41 hours. This means that every 41 hours, half of the element decays, leaving only half of the previous amount. Suppose we start with 60 grams of the element.

1. Write a function, $f(t)\text{,}$ for the amount of the element left after $t$ hours.
   Answer: $f(t) =$
2. Determine when the amount of the element remaining drops below $10$ grams.
   Answer: hours