1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
JulijaS [17]
2 years ago
8

The sound level of a jet plane is approximately 140 dB. The intensity of the sound of a jet plane is approximately

Mathematics
1 answer:
Leya [2.2K]2 years ago
8 0

Answer:

280 DB

Step-by-step explanation:

You might be interested in
The polar coordinates of a point are 3π 4 and 7.00 m. What are its Cartesian coordinates (in m)? (x, y) = 6.06,−3.5 m
Keith_Richards [23]

Answer:

a) \left(x,y\right)=\left(4.95,-4.95\right)

b) r\angle\theta = 7\angle0.5236\,\text{radians}

Step-by-step explanation:

Polar coordinates are represented as: r\angle\theta, where 'r' is the length (or magnitude) of the line, and '\theta' is the angle measured from the positive x-axis.

in our case:

7\angle\dfrac{3\pi}{4}

to covert the polar to cartesian:

x = r\cos{\theta}

y = r\sin{\theta}

we can plug in our values:

x = 7\cos{\dfrac{3\pi}{4}} = -7\dfrac{\sqrt{2}}{2}

y = 7\sin{\dfrac{3\pi}{4}} = 7\dfrac{\sqrt{2}}{2}

the Cartesian coordinates are:

\left(x,y\right)=\left(-7\dfrac{\sqrt{2}}{2},7\dfrac{\sqrt{2}}{2}\right)

\left(x,y\right)=\left(4.95,-4.95\right)

(b) to convert (x,y) = (6.06,-3.5)

we'll use the pythagoras theorem to find 'r'

r^2 = x^2+y^2

r^2 = (6.06)^2+(-3.5)^2

r = \sqrt{48.97} \approx 7

the angle can be found by:

\tan{\theta} = \dfrac{y}{x}

\tan{\theta} = \dfrac{3.5}{6.06}

\theta = \arctan{left(\dfrac{3.5}{6.06}\right)}

\theta = 0.5236 \text{radians}

to convert radians to degrees:

\theta = 0.5236 \times \dfrac{180}{\pi} \approx 30^\circ

writing in polar coordinates:

r\angle\theta = 7\angle30^\circ\,\,\text{OR}\,\,7\angle0.5236\,\text{radians}

5 0
3 years ago
75% of 129 is what?<br><br> Does anyone know how to do this ?
Gala2k [10]

Answer:

96.75

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
Pentagon ABCDE and pentagon A’B’C’D’E are shown on the coordinate plane below:
fiasKO [112]

the first one ((x+8, y+2), r x-axis)

3 0
2 years ago
Y
Natali5045456 [20]
The answer is 19 x yay
6 0
3 years ago
Question Down Below...
Delicious77 [7]
5/12 equals to 20/48.

48÷12=4
5×4=20
7 0
3 years ago
Read 2 more answers
Other questions:
  • Find the next number in the given series?2,3,8,27,112,?
    12·1 answer
  • 63-47 using mental math​
    8·2 answers
  • (a) Consider the following system of equations for the growth of rabbits and foxes from year to year: R' = 1.5R-.2F + 100 write
    10·1 answer
  • Which is more, 1 pound or 12 ounces?​
    14·2 answers
  • Simplify this polynomial identity 5(3+6)+2(7+3)
    14·1 answer
  • (X+2)(X+6) simplify using grouping
    9·2 answers
  • Log10 (x squared - 4x + 7) = 2
    11·1 answer
  • Maria's dog weighs 8 times as much as her rabbit. Together they weigh 81 pounds. How much does the dog Weigh?​
    7·1 answer
  • The first four terms of a sequence are shown below 75, 100
    5·2 answers
  • A restaurant bill for 4 people is $120. The group leaves a tip of $18. What percent tip is that?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!