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
.

Answer:

try photo math it's meant for this kind of stuff

Answer:

Try the first one but I think i that it

Step-by-step explanation:

Hope that helps

Answer:

The 7th term of the sequence is 0.000768

Step-by-step explanation:

As given, the sequence is : 12, -2.4 , 0.48, ....

The first term = 12

Second term = -2.4

Third term = 0.48

Common ratio = [tex]\frac{-2.4}{12} = \frac{0.48}{-2.4} = -0.2[/tex]

Fourth term = 0.48(-0.2) = -0.096

Fifth term = -0.096(-0.2) = 0.0192

Sixth term = 0.0192(-0.2) = -0.00384

Seventh term = -0.00384(-0.2) = 0.000768

Answer:

Part A: If Beatrice inputs −8 into the function, she must get an output of 8.

Part B: (−4,8) , (4,−8) , (8,−4)

Step-by-step explanation:

Part A:

We know that a function is a relation that maps elements from one set (The domain, the set of the inputs) into elements from another set (the range, the set of the outputs)

Such that each input can be mapped into only one output.

Then if we know that our function maps the input -8 into the output 8.

Always that we use this function with the input -8. we will have the same output, 8.

Then we can conclude that the correct option to the first part is:

"If Beatrice inputs −8 into the function, she must get an output of 8. "

Part B:

Remember, -8 is mapped into 8, then the point (−8,4) (this says "-8 is mapped into 4) can never be on the graph of the function.

But the points:

(−4,8) , (4,−8) , (8,−4)

Could be on the graph of the function.

Answer:

correct A:-8,8

B: -4,8

Step-by-step explanation:

Answer:

3.9 that's how much he had

Answer:

He had $3.90 at the start of his walk.

Step-by-step explanation:

To find out how much money he had before his walk, you would take 2.55 + 1.35 and that you give you 3.9. But since we are dealing with money, you need to have the 0 at the end. So he started with $3.90 when he started his walk.

Answer:

27 i think

Step-by-step explanation:

I divided them to make sure its right im not 100 percent sure tho

Answer:

[tex]\sqrt{25}[/tex]

Step-by-step explanation:

Answer:

c= -5

Step-by-step explanation:

Answer:

i think C is 27 1/2 and D is 2 1/22 i dont know though let me know if its wrong

Step-by-step explanation:

i just turned them into mixed numbers

The decimal number 46.69 is 0.01 more then 46.7.

The given decimal numbers are 0.01 and 46.7.

To subtract decimals, follow these steps: Write down the two numbers, one under the other, with the decimal points lined up. Add zeros so the numbers have the same length. Then subtract normally, remembering to put the decimal point in the answer.

Now, 46.7 - 0.01

= 46.69

Therefore, the decimal number 46.69 is 0.01 more then 46.7.

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Answer:

Your answer is: (-1/2, 3/2)

Step-by-step explanation:

y = x + 2

y = -3x

Use substitution by plugging the second equation into the first.

-3x = x +2

Subtract x from both sides to combine the variables.

-4x = 2

Divide both sides by -4 to isolate the variable x.

x = 2/-4

Simplify.

x = -1/2

Plug x into one of the equations to find y.

y = (-1/2) + 2

y = 3/2

Plug x into the other equation to confirm your answer.

y = -3(-1/2)

y = 3/2

Your answer is: (-1/2, 3/2)

Answer:

a/3b^2

Step-by-step explanation:

16a^2b^3c^6/48ab^5c^6

the c^6 cancel out, then simplify a^2 and a: ​16a^2b^3/48ab^5 = ​16ab^3/48b^5

Then divide 48 and 16 you get 3 ​16ab^3/48b^5 = ab^3/3b^5

And lastly, simplify b^3 and b^5  ab^3/3b^5 =

a/3b^2

Answer:

D)  √130

The distance of the given points

AB = √130

Step-by-step explanation:

Explanation:-

Given points are A(-3,6) and B( 4,-3)

The distance formula

   AB = [tex]\sqrt{x_{2}-x_{1})^{2} +(y_{2} -y_{1} )^{2} }[/tex]

 AB = [tex]\sqrt{(4-(-3))^{2} +(-3-6)^{2}[/tex]

 AB = [tex]\sqrt{(7)^{2} +(-9)^{2} }[/tex]

AB = [tex]\sqrt{49+81}[/tex]

AB = √130

Answer:

its the first one im doing it on edg right now

Step-by-step explanation:

Answer:

the answer is a = -4

Step-by-step explanation:

pls mark brainliest

Answer:

a = -4

Step-by-step explanation:

To find a, we need to get the variable on one side of the equation. So first we distribute.

-3a+5=a-6a-3 Now we subtract 5 from both sides and add the a to the -6a

-3a=-5a-8 Now we add 5a to both sides

2a=-8 And lastly divide both sides by 2

a= - 4

I hope this helps and please add me as brainliest! Thanks! <3

Answer:

$384,000

Step-by-step explanation:

Answer: Well if we have to round up i would say he makes about 6660.60 dollars a day

If there are any answer choices maybe i could help a bit morec

Step-by-step explanation:

Answer:

B 2/3

Step-by-step explanation:

Answer:

19/25 it cant simplified

Step-by-step explanation:

==============================================================

Work Shown:

x = side length = 1 unit

SA = surface area of cube

SA = 6x^2

SA = 6*1^2

SA = 6*1

SA = 6

The surface area of the cube is 6 square units.

-------------------------

Side note:

In general, each face is x*x = x^2 units in area, and there are 6 of those faces. This is why the general surface area is 6x^2. In this case, each face is 1 square unit, so all 6 faces lead to a total of 6 square units.

Given:

A soda and two slices of the pizza of the day cost $10.25.

A soda and four slices of the pizza day cost $18.75.

To find:

The cost of each item.

Solution:

Let x be the cost of a soda and y be the cost of each slice of the pizza.

A soda and two slices of the pizza of the day cost $10.25.

[tex]x+2y=10.25[/tex]           ...(i)

A soda and four slices of the pizza day cost $18.75.

[tex]x+4y=18.75[/tex]           ...(ii)

Subtracting (i) from (ii), we get

[tex]x+4y-x-2y=18.75-10.25[/tex]

[tex]2y=8.50[/tex]

[tex]y=\dfrac{8.50}{2}[/tex]

[tex]y=4.25[/tex]

Putting y=4.25 in (i), we get

[tex]x+2(4.25)=10.25[/tex]

[tex]x+8.50=10.25[/tex]

[tex]x=10.25-8.50[/tex]

[tex]x=1.75[/tex]

Therefore, the cost of each soda is $1.75 and the cost of each slice of pizza is $4.25.

Step-by-step explanation:

The Answer is C I got it right on edge.

Answer:

B) 6(4x + 3y)

Step-by-step explanation:

I got that one wrong I got a 90 but B is it

Answer:

12/13 or 92.31%

Step-by-step explanation:

Answer:

48%

Step-by-step explanation:

So, we have to find what percentage is 12 out of the whole thing so:

We add the boys and the girls together to get the whole thing:

12 + 13 = 25

Then we turn it into a fraction:

12/25 = 48/100

So, 48% of the class is boys

Answer:

d. 60

Step-by-step explanation:

x=15/0.25

15/0.25=60

The pizzeria L will make more money if the number of sold pizzas is higher and given by y = 13x.

Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side. It demonstrates the equality of the relationship between the expressions printed on the left and right sides.

In other terms, it is a mathematical statement stating that "this is equivalent to that." It appears to be a mathematical expression on the left, an equal sign in the center, and a mathematical expression on the right.

Given:

The amount of​ money, y, pizzeria K makes by selling x pizzas,

y = 13x

The value of money changes in the multiple of 13, if 1 pizza is sold money value is 13, if 2 then the money is 26 etc.

Thus, pizzeria L make more money when the number of pizza sold is higher.

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Answer:

$16.35

Step-by-step explanation:

26.16/8 = $3.27 per gallon. 3.27x5= 16.35, so she has to pay $16.35 for an extra 5 gallons.

Answer:the answer is 70 u welcome text me if wrong armstrongtamarion

Step-by-step explanation:

Answer:

X = -1/2 or 1/2

Step-by-step explanation:

When the square root of  a number is found, this usually results in 2 solutions which may be equal in size but opposite in signs.

As such,

X^2=1 to find x find the root of both sides

X = √1

X = -1 or 1

Going by this

4x^2=1

Divide both sides by 4

X^2=1 /4

taking the square root of both sides

X = √1/4

The root of 1 is -1 or 1 while that of 4 is -2 or 2 hence,

X = -1/2 or 1/2

Answer:

C

Step-by-step explanation: