Answer:
the answer should be 76.333...(nearest tenth 76 ) or 26.
Explanation:
since she was already at 151 feet below, I subtracted 229 with 151 and got the answer 78 so after it I just divided it with 3 cause she went down in 3 seconds and the answer could be 76.333 if we dont subtract 229 with 151.
(sorry, my explanation is bad)