How much paint is needed to cover a floor that is 8 meters by 10 meters?
1 answer:
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Answer:
150.51 dB
Step-by-step explanation:
Data provided in the question:
decibel level of sound at 161 km distance = 180 dB
d₁ = 161 km
d₂ = 4800 km
I₁ = 180 db
The formula for intensity of sound is given as:
I =
and the relation between intensity and distance is given as:
I ∝
or
Id² = constant
thus,
I₁d₁² = I₂d₂²
or
therefore,
I =
or
I =
or
I = 20 × (-1.474)
or
I = -29.49
Therefore,
the decibel level on Rodriguez Island, 4,800 km away
= 180 - 29.49
= 150.51 dB
Answer:
Step-by-step explanation:
First, find the <em>rate of change</em> [<em>slope</em>]:
Then, plug these coordinates into the Slope-Intercept Formula instead of the <em>Point-Slope Formula</em> because you get it done much swiftly that way. It does not matter which ordered pair you choose::
−5 = 4 + b
If you want it in <em>Standard Form:</em>
y = 4x - 9
- 4x - 4x
_________
_______________________________________________
3 = 4[3] + b
12
y = 4x - 9
- 4x - 4x
_________
** You see? I told you it did not matter which ordered pair you choose because you will ALWAYS get the exact same result.
I am joyous to assist you anytime.