Answer:
13.4
Explanation:
The tree to the shadow forms a right angle triangle, so to calculate the distance from the tree tip to the shadow tip we can use pythagoras.
a^2 +b^2 = c^2
12^2 +6^2 = 144 +36 = 180 =c^2
Square root of 180 is approx 13.42.
To the nearest 10th = 13.4