Answer:
The actual height is 150ft
Step-by-step explanation:
Given


Required
Determine the actual height
Substitute 60ft for width in: 

Express as fraction


Make height the subject



Solution:
we are given that
If G is the midpoint of FH, it mean that

we are also given that

So we can write

So 
1. -6 ≤ x < -1 . . . . conjunction
2. x ≤ 6 . . or . . 10 ≤ x . . . . disjunction
3. 7 ≤ x < 12 . . . . conjunction
4. x < -9 . . or . . -3 ≤ x . . . . disjunction
5. 2 ≤ x ≤ 5 . . . . conjunction
6. x ≤ 54 . . or . . 66 ≤ x . . . . disjunction
7. 39 < x ≤ 43 . . . . conjunction
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Your problem statement provided no letters.
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