3 years ago

HELPPPP!!! TRUE OR FALSE

Mathematics

2 answers:

ElenaW [278]3 years ago

7 0

It’s true I think it was

shusha [124]3 years ago

3 0

I think it may be true, please correct me if i am wrong

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3 years ago

Anyone know this one

Kryger [21]

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3 years ago

Describe the end behavior of f(x) = - 2 ^ (x + 3) - 1

PilotLPTM [1.2K]

Answer: the answer is an equation

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3 years ago

when full the gas tank of a car holds 15 gallons. it now contains 12 gallons. what percent represents how full the tank is?

Masteriza [31]

Hello!

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(remaining) / (total) = X

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in this case:

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5 0

2 years ago

One of the loudest sounds in recent history was that made by the explosion of Krakatoa on August 26-27, 1883. According to barom

liraira [26]

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 = $10\log(\frac{I_2}{I_1})$

and the relation between intensity and distance is given as:

I ∝ $\frac{1}{d^2}$

Id² = constant

thus,

I₁d₁² = I₂d₂²

$\frac{I_2}{I_1}=\frac{d_1}{d_2}$

therefore,

I = $10\log(\frac{d_1}{d_2})^2$

I = $10\times2\times\log(\frac{161}{4,800})$

I = 20 × (-1.474)

I = -29.49

Therefore,

the decibel level on Rodriguez Island, 4,800 km away

= 180 - 29.49

= 150.51 dB

8 0

2 years ago