Answer: 31.6
Step-by-step explanation: We have to use the pythagorean theorem to get the answer for the question.
a² + b² = c²
30² + 10² = c ²
900 + 100 = c²
c² = 1000
С = 31.6
The distance between the person and the top of the tree is 31.6 feet.
I hope this helps!