Question 1204103
If bottom angle 23° 46' is measure B
and top angle 5° 16' is measure T
(The assigning B and the T very helpful because too many characters to write or type before finishing!)
x, length from point to bottom at center of hill
y, the height of hill


Then when you draw and label the description, you may make these:


{{{system(y/x=tan(B),tan(T+B)=(y+45)/x)}}}


...and solve....


On the way find {{{y=(45tan(B))/(tan(T+B)-tan(B))}}};
Now, substitute and evaluate y.