Answer:
14.4 m
Explanation:
let the height of the tower from line of sight be x, then
tan23° = = ( multiply both sides by 30 )
30 × tan23° = x , thus
x ≈ 12.7 m
Total height of tower = 12.7 + 1.7 = 14.4 m ( to the nearest tenth )
10ft
5.6m questions
7.3m answers
= 
( multiply both sides by 30 )