A Jackhammer from 1 meter away produces roughly 100dB of sound. What is the sound pressure caused by the Jackhammer? Recall that the loudness of a sound in decibels (dB) is given by the equation L=20log10(ppref) dB. Please help i'm so lost!!!

Answers

Answer 1

Answer:2

Step-by-step explanation:

Answer 2

Answer:

2Pa

Step-by-step explanation:

just did the hw :)


Related Questions

Need help ASAP. I only have limited time to answer before turning in!

Answers

Answer:

Slope-1/4 Y-intercept--2 Equation-y=1/4x+-2 and choose any point on the line.

Step-by-step explanation:

To find slope, you will have to make a slope triangle with two intersecting points. Divide h/v witch is 1/4. The y-intercept is just the point on the y-axis so that is -2. For the fourth question, just choose any coordinate on the oblique line.

Hope that helps!

What are the coefficients in "5+8x+7+6x+2"

Answers

The coefficient is 8 +6

Which angles are coterminal angles for an angle of 125°?

Answers

Answer:

125° = 25/36 π ≈ 0.694 π

Positive coterminal angles: 485°, 845°, 1205°, 1565°

Negative coterminal angles: -235°, -595°, -955°, -1315°

how do I graph f(x) = 1/4(x-1)2 - 3

Answers

This is the correct graph.
Find the intercepts, if there are any. ...
Find the vertical asymptotes by setting the denominator equal to zero and solving.
Find the horizontal asymptote, if it exists, using the fact above.
The vertical asymptotes will divide the number line into regions. ...

WILL MARK BRAINLIEST! PLEASE HELP!
Write 206 in base 7

Answers

Answer:

wut

Step-by-step explanation:

4) The table below shows the price of paper plates at the grocery store. Find the unit price of
each brand, rounded to the nearest cent. Which is the best buy? Explain your reasoning.
Sturdy Plates 24 pack for $3.28
No Spill Plates 10 pack for $1.79
Compartment Plates 50 pack for $6.00

Answers

Answer:

Compartment plates is the best buy

Step-by-step explanation:

To find unit price, you can just divide the price by the number of plates

Sturdy plates: 3.28÷24= $0.14/plate

No spill plates: 1.79÷10 = $0.18/plate

Compartment plates: 6.00÷50 = $0.12/ plate

Out of all of the prices, $0.12 is the cheapest

Hope this helps

Please help me out!​

Answers

Answer:

B is correct because it value become 15^9

Step-by-step explanation:

on a number line,9.7 would be located. Choose all answers that make a true statement
A. to the right of 9.53
B. to the right of 9.8
C. between 10.6 and 10.8
D. to the left of 9.9

Answers

B because 9.8 is greater than 9.7 so it’s be to the right

At the beginning of the year, Sadie had $70 in savings and saved an additional $18 each week thereafter. Jack started the year with $90 and saved $14 every week. Let S S represent the amount of money Sadie has saved t t weeks after the beginning of the year and let J J represent the amount of money Jack has saved t t weeks after the beginning of the year. Write an equation for each situation, in terms of t , t, and determine the amount of money Sadie and Jack have saved in the week that they have the same amount of money saved.

Answers

Answer:

$160

Step-by-step explanation:

Step one:

For Sadie

initial savings balance= $70

weekly savings = $18

Let S represent the amount of money Sadie has saved

and  t the number of weeks after the beginning of the year

The total amount in savings after t weeks is

S=18t+70-------1

For Jack

initial savings balance= $90

weekly savings = $14

Let J represent the amount of money Jack has saved

and  t the number of weeks after the beginning of the year

The total amount in savings after t weeks is

J=14t+90---------2

Step two

equation 1 and 2 to find t

18t+70=14t+90

18t-14t=90-70

4t=20

divide both sides by 4

t=20/4

t=5 weeks

so after 5 weeks Sadie and Jack will have the same amount of money

For Sadle t=5

S=18(5)+70-------1

S=90+70

S=$160

For Jack t=5

J=14(5)+90---------2

J=70+90

J=160

The two equations above shows that after 5 weeks their savings will be $160

sole the proportion

Answers

Answer:

11/6 or 1.8333333333

Step-by-step explanation:

[tex]\frac{2x + 1}{6}[/tex] = [tex]\frac{7}{9}[/tex]

Cross Multiply:

7 x 6 = 42

9 (2x+1)

42 = 9(2x+1)

42 = 18x + 9

Then, isolate the variable. In order to do so, subtract 9 from both sides.

33 = 18x

Now, divide by 18 (to find x)

33/18 =

1.8333333 or 11/6

I need to know if these two graphs are a function, is one a function? is two a function?

Answers

                                     Question 7

Answer:

The graph in question 7 is a function.

Step-by-step explanation:

In order to check whether the graph in question 7 is a function or not, we need to draw a vertical line anywhere on the graph, and if does not hit the graph more than once, it is a function.

It is observable that the vertical line will always intersect the graph in question 7 at the only place.

From the graph, it is clear the green vertical line intersects the graph at the only place. Hence, the graph in question 7 is a function.

Therefore, the graph in question 7 is a function.

                                               Question 8

Answer:

The graph in question 8 is not a function.

Step-by-step explanation:

In order to check whether the graph in question 8 is a function or not, we need to draw a vertical line anywhere on the graph, and if does not hit the graph more than once, it is a function.

It is observable that the vertical line intersects the graph in question 8 at more than one place.

From the graph, it is clear the green vertical line intersects the graph at x=-3 at more than one place. We can not have the same x values for the two output values in order to be a function. Hence, the graph in question 8 would NOT be a function.

Therefore, the graph in question 8 is not a function.

A news program invites its viewers to call in and share their position on a proposed tax increase. Ninety percent of the viewers that call in say that they will vote against the tax increase. For which population is 90\%90%90, percent a legitimate estimate of the percent of voters who will vote against the tax increase? Choose 1 answer: Choose 1 answer: (Choice A) A Only those viewers who called in (Choice B) B Only viewers of this particular episode (Choice C) C Only regular viewers of the show (Choice D) D Only those who have watched this show at some point (Choice E) E All voters

Answers

Answer:

(Choice A) Only those viewers who called in

Step-by-step explanation:

The statement tell us Ninety percent of the viewers that call in say that they will vote against the tax increase.

This explains it is option A .

Choice B is incorrect as all viewers may not have called in.

Choice C is also incorrect all regular viewers do not call in.

Choice D is incorrect calls are not received at any point at only specific time.

Choice E is incorrect because all voters again may not call in.

I sell cookies for $3 and muffins for $7. Yesterday, I made $129. I sold a total of 27 items. How many of each did I sell?

Answers

You sold 15 cookies and 12 muffins.

c - cookies
m - muffins

c + m = 27

3c + 7m = 129

I don’t know how to explain how to do efficiently but I just plugged in numbers until it worked:

3(15) + 7(12) = 129

45 + 84 = 129

Answer:

You sold 15 cookies and 12 muffins

Step-by-step explanation:

So you're given that 1 cookie is sold for $3 and 1 muffin is sold for $7

You're also given that in total you made $129, and sold 27 items

Let's make equations from that, letting c stand for amount of cookies and m for amount of muffins.

3c + 7m = 129 (equation for amount of money made)c + m = 27 (equation for amount of items sold)

Now we can use the second equation to find m:

c + m = 27

m = 27 - c

Not we can substitute m into the first equation to find c:

3c + 7m = 129                  

3c + 7(27-c) = 129            [substitute m for (27-c)]

3c + 189 -7c = 129           [distribute 7 into (27-c)]

-4c + 189 = 129                [combine like terms]

-4c = -60                          [subtract 189 from both sides]

c = 15                               [divide both sides by -4]

Now we can substitute c into the second equation to find m:

c + m = 27

15 + m = 27

m = 12

Ben walked 2/5 mile. Tonya walked 1/4 mile. What fraction of a mile did they walk in total?

Answers

Answer:

First you need to make the denominators equivalent so you can add them.

× =

× =

Then you can add them together

+

=

They walked [tex] \frac{13}{20} [/tex] of a mile altogether

Step-by-step explanation:

It’s 13/20 in total

when an item is marked up by a certain percent and then marked down by the same percent, is the sale price equal to the price before the markup and markdown?

Answers

Answer: yes it is

Step-by-step explanation:

what is true about the number of sides in any regular polygon that has at least one line of symmetry passing through two vertices

Answers

Step-by-step explanation:

A regular n-sided polygon has n lines of symmetry.  If n is odd, each line of symmetry passes through only one vertex.  If n is even, half the lines pass through two vertices, and half pass through none.

So if a line passes through two vertices, the polygon must have an even number of sides.

An industrial machine is able to make 35 pens in 5 seconds. What is the rate made per second?

Answers

Answer:7 pens per second

Step-by-step explanation: 35/5=7

Answer: 7 Pens Per second

Step-by-step explanation:

35/5 = 7

What is -1/8 - 0.356

Answers

Answer:

-0.481

Step-by-step explanation:

-1/8 is equal to -0.125

-0.125 - 0.356 = -0.481

The answer is -0.481!

There is a castle with a million dollars for anyone who can get to it first. The castle is surrounded by a moat that is square (4 equal sides) and the moat is 12ft wide at all areas. You have two 10' wooden planks, but no nails, rope, clothing or any other materials or means to put the planks together. Also, you cannot toss one to the other side, and lay one in on the shoreline and walk down into the moat and back up to the other side. think of the moat as charged with a bazillion volts of electricity. Can you get to the million dollars and the castle? ​

Answers

Answer:

12ft

Step-by-step explanation:

Which system of equations is satisfied by the solution shown in the graph?

Answers

Answer:

(-2, 8) does not satisfy any system of the equation. In other words, no system of the equations satisfies the solution as shown in the graph.

Thus, not a single given option of the system of the equations satisfies the solution as shown in the graph.

Step-by-step explanation:

We know that the point of intersection of two lines on a graph is the solution of the system of equations.

From the graph, it is clear that the two lines intersect at x=-2 and y=8.

Thus, the point of intersection of the two lines is (-2, 8)

Putting the (-2, 8) in the first system of equations

x+2y=10              and              x-y = 6

-2+2(8)=10          and             -2-8=6  

14 = 10                 and               -10 = 6

L.H.S ≠ R.H.S       and               L.H.S ≠ R.H.S

L.H.S and R.H.S of both the system of equations are not equal, It means (-2, 8) does not satisfy the system of the equations x+2y=10  and x-y = 6.

Putting the (-2, 8) in the second system of equations

x+2y=6              and              x-y = 10

-2+2(8)=6          and             -2-8=10  

14 = 6                 and               -10 = 10

L.H.S ≠ R.H.S       and               L.H.S ≠ R.H.S

L.H.S and R.H.S of both the system of equations are not equal, It means (-2, 8) does not satisfy the system of the equations x+2y=6 and x-y = 10.

Putting the (-2, 8) in the third system of equations

x+y=6              and              x-y = 10

-2+8=6            and             -2-8=10  

6 = 6                 and           -10 = 10

L.H.S = R.H.S       and          L.H.S ≠ R.H.S

L.H.S and R.H.S of x-y = 10 is not equal, It means (-2, 8) does not satisfy the system of the equations x+y=6 and x-y = 10.

Putting the (-2, 8) in the second system of equations

x+y=6              and              x-2y = 10

-2+8=6             and             -2-2(8)=10  

14 = 6                 and             -18 = 10

L.H.S ≠ R.H.S       and               L.H.S ≠ R.H.S

L.H.S and R.H.S of both the system of equations are not equal, It means (-2, 8) does not satisfy the system of the equations x+y=6 and x-2y = 10.

In a nutshell, (-2, 8) does not satisfy any system of the equation. In other words, no system of the equations satisfies the solution as shown in the graph.

Thus, not a single given option of the system of the equations satisfies the solution as shown in the graph.

4x4-8x2y2+49y4.... Resolve into factor.. Please show step by step..​

Answers

Answer:

3443ye

Step-by-step explanation:

HURRY !!!!!!!!!! Which choices correctly describe reflections in the diagram? Check all that apply. On a coordinate plane, triangle A is reflected across the x-axis to form triangle D. Triangle D is reflected across the x-axis to form triangle C. Triangle D is reflected across y = x to form triangle B. The red triangle A is reflected across the x-axis onto triangle B. The red triangle A is reflected across the y-axis onto triangle D. The blue triangle D is reflected across the x-axis onto triangle C. The blue triangle D is reflected across the line y = x onto triangle B. The green triangle C is reflected across the line y = –x onto triangle A.

Answers

Answer:

I believe the answers are 2,3, and 4.

Step-by-step explanation:

You are the lucky winner because you have found this answer. Have a good day.

The red triangle A is reflected across the y-axis onto triangle D, the blue triangle D is reflected across the x-axis onto triangle C and the green triangle C is reflected across the line y = –x onto triangle A. Then the correct options are B, C, and E.

What is a transformation of a shape?

A point, line, or mathematical figure can be converted in one of four ways, and each has an effect on the object's structure and/or position.

The reflection does not change the shape and size of the geometry. But flipped the image.

Let's check all the options. Then we have

A.The red triangle A is reflected across the x-axis onto triangle B. Incorrect, because the orientation is different.

B.The red triangle A is reflected across the y-axis onto triangle D. Correct.

C.The blue triangle D is reflected across the x-axis onto triangle C. Correct.

D.The blue triangle D is reflected across the line y = x onto triangle B. Correct, because the orientation is different.

E.The green triangle C is reflected across the line y = –x onto triangle A. Correct.

The red triangle A is reflected across the y-axis onto triangle D, the blue triangle D is reflected across the x-axis onto triangle C and the green triangle C is reflected across the line y = –x onto triangle A. Then the correct options are B, C, and E.

More about the transformation of the shape link is given below.

https://brainly.com/question/27224339

#SPJ6

The missing diagram is given below.

3. A geometric sequence g starts at 500 and has a growth factor of 0.6. Sketch a graph of g
showing the first 5 terms.

Answers

Answer:

Here you go! Sorry if its not in the correct format.

Hope this helps!

All five terms of GP are 500, 800, 1280, 2048, and 3276.8.

What is geometrical progression series?

A geometric progression is a sequence in which any element after the first is obtained by multiplying the previous element by a constant which is called a common ratio denoted by r.

For example, the sequence 1, 4, 16, 64,… is a geometric sequence with a common ratio of r = 4.

Given the first term 500

And it is growing by 0.6 factor

It means,

Second term = first term + 0.6 of first term

Second term = 500 + 0.6(500)

Second term = 500 + 300 = 800

And similarly, all three terms are 1280, 2048, and 3276.8.

Hence "All five terms of GP are 500, 800, 1280, 2048, and 3276.8".

For more information about the geometrical progression,

brainly.com/question/4853032

#SPJ2

Find the slope of the line containing the pair of points.
(-1,3) and (7,0)?

Answers

Answer:

-3/8

Step-by-step explanation:

Answer:

[tex]-\frac{3}{8}[/tex]

Step-by-step explanation:

[tex]M=\frac{x2-x1}{y2-y1}[/tex][tex]m=\frac{7-(-1)}{0-3}[/tex][tex]m=\frac{-3}{8}[/tex]

2(x + 2) = 14

Help me please

Answers

Answer:

x=5

Step-by-step explanation:

Answer:

x = 5

Step-by-step explanation:

Original Equation:

2(x + 2) = 14

Use distributive property

2 · x = 2x

2 · 2 = 4

Your equation should look like this now:

2x + 4 = 14

Subtract 4 from both sides.

2x = 10

Divide both sides by 2

x = 5

Hope this helped :)

Please consider Brainliest :)

Which of the following statements about the graph of y= 34x −1 are true? Select all that apply.

A.) The slope of the line is 3/4.
B.) The slope of the line is 1.
C.) The line intersects the point (0,3/4).
D.) The line intersects the point (0, -1).
E.) The y-intercept is -1.
F.) The y-intercept is 3/4.

Answers

9514 1404 393

Answer:

  A, D, E

Step-by-step explanation:

Assuming your graph is of the equation ...

  y = 3/4x -1

The slope is 3/4. The line intersects (0, -1). The y-intercept is -1.

  A, D, E are true

2 tens 1 one x 10 can you tell my the answer

Answers

Answer:

the answer is 210

Step-by-step explanation:

10×10=20+1=21, 21×10=210

You set up 240 chairs in four rows. How many chairs are in one row?

Answers

Answer:

60

Step-by-step explanation:

whats 1+1 please help

Answers

Answer:

Two haha

Step-by-step explanation:

but thanks for the points (:

It's 2

Hope this will help..

Is 1.64 rational or irrational?

Answers

Answer:

irrational, I am not that sure tho

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