Answer:
Explanation:
We can see that the triangle formed is right triangle.
Let's verify:
- 12² + 9² = 144 + 81 = 225
- 15² = 225
- confirmed
We have similar triangles and the ratios of corresponding sides are:
- x/9 = 12/15
- x = 12*9/15
- x = 7.2 ft
The visitors can have a closest distance of 7.2 ft