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Anastaziya [24]
2 years ago
8

The formula B=10log(i/i0) is used to find the sound level, , in decibels (dB), of a sound with an intensity of I. In the formula

, represents the smallest sound intensity that can be heard by the human ear (approximately ).
What is the sound intensity of a noise that is 130 dB?

The sound intensity is
.

Mathematics
1 answer:
Arturiano [62]2 years ago
5 0

Answer:

The Answer is 10 watts/meter^2.

Step-by-step explanation:

Substitute 130 for B.

Substitute 10^-12 for i0.

I am not going to write absolutly everything because I would be here for days lol

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jek_recluse [69]
Please please thank you lord lord for
8 0
2 years ago
This isnt urgent but i need an answer, i will give the person who answers correctly brainliest, please try
SSSSS [86.1K]

Answer:  3, 5, 7

Step-by-step explanation:

There is a "trick" to determine divisibility by 3: if the sum of the digits is divisible by 3, the number is divisible by 3.

3 + 1 + 5 = 9 which is a multiple of 3, so 315 is divisible by 3.

It works for 9 also. since the sum of the digits is 9, 315 is divisible by 9.

Divisibility by 5: any number that has the units digit 5 or 0 is divisible by 5.

For 7, I just tried it  315÷7= 45

Only even numbers are divisible by 2.

If a 3-digit number is divisible by 11, the middle digit will be the sum of the first and last digits.   (That is not the case for 315)  But 385 is divisible by 11, also 495, 253, and many others you can try for fun.

8 0
3 years ago
Find a value of x that makes the equation true:<br> -(-2x + 1) = 9 – 14x
luda_lava [24]

Answer:

x=0.625

Step-by-step explanation:

-(-2x+1)=9-14x

distribute:

2x-1=9-14x

add  1 to both sides

2x = 10-14x

add 14x to both sides

16x=10

divide by 16 to isolate x

x = 0.625

check:

-(-2(0.625)+1) = 9-14(0.625)

0.25 = 0.25

5 0
2 years ago
Read 2 more answers
If the perimeter of the triangle is 32 cm what is the length of each two sides? Write and solve equation
scZoUnD [109]

Answer:

12 centimeters

Step-by-step explanation:

An isosceles triangle has two congruent sides which are legs(2 sides having same length )If x is length of each leg, then we ca write the equation like this

equation: x+x+8=32

combine like terms

2x +8 = 32

minus 8 from each side

2x=32-8

2x=24

divide both sides by 2

2x/2 = 24/2

x=12 centimeters

3 0
3 years ago
The number 0.14356712341… never repeats or terminates. The number is number. Rounded to the nearest thousandth, it is
Alenkinab [10]
0.144 because the number after 3 is 5 and that rounds the 3 to a 4.
3 0
3 years ago
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