Answer:
The two teachers are 13 feet apart
Explanation:
Right Triangles
Ava, her math teacher, and her science teacher form a right triangle in which she is at the 90° vertex.
The distances from the three people must satisfy the Pythagora's theorem, where the distance between the two teachers (D) is the hypotenuse, thus:



D = 13 feet
The two teachers are 13 feet apart