57. In the diagram, the roof has a height of 3 meters. Find the surface area of the figure shown,
1 answer:
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In the figure we have three parallel lines cut by two transversals
The theorem stares:
If two or more parallel lines are cut by two transversals, then they divide the transversals proportionally.
Applying this theorem we have:
To solve for x we cross multiply
6x=20
Dividing both sides by 6 we have:
The second option x= is the right answer
Answer:
50 Db
Step-by-step explanation:
we know that
The loudness in decibels is given by the formula
where
I = sound intensity in watts per square meter (Watts/m^2)
I₀ = reference intensity, = 10^(-12) Watts/m^2
so
For I=10^(-7) Watts/m^2
substitute in the formula above and solve for L