After 62.0 min, 33.0% of a compound has decomposed. what is the half-life of this reaction assuming first-order kinetics?

The first thing you need to do, is to find the half life which is ( = (ln2)/k). To find it, we have to use the rate constant k
The first order reaction has to be like this  :
Then :
Then substitute these value and kind the k value.
After substitution you can easily find what you were asked to find.

Ithink 2 is the correct