I got that the building is 136.9902912...(nonterminating) meters tall. Or you could round that to 137m tall. I got that by setting up ratios of the height and the shadows, then cross multiplying.
<span>solve 7x+2=-54
</span>7x+2=-54
-2 -2
7x=-56
---- ----
7 7
x=-8
Answer:
C
Step-by-step explanation:
Given
tanθ =
=
This is a right triangle with legs 1 and 2
Using Pythagoras' identity
hypotenuse² = 1² + 2² = 1 + 4 = 5 ( take square root of both sides )
hypotenuse = 
θ is in the 3rd quadrant where sinθ < 0 , then
sinθ =
= -
← rationalise the denominator
= -
× 
= -
→ C