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Eddi Din [679]
3 years ago
13

Can you match it??. Only if you know please

Mathematics
1 answer:
Dennis_Churaev [7]3 years ago
8 0

Answer:

Step-by-step explanation:

triangle: a+b>c. If two lengths are put together, and equals more than the length of the third side, then it's a triangle

right triangle: a2+b2=c2 if the square of the two lengths equal the square of the third, then it's a right triangle

acute triangle: a2+b2>c2 if the square of the two lengths are greater than the square of the third it's acute

obtuse triangle:a2+b2<c2 if the square of the two lengths are less than the square of the third it's obtuse

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What is the sound level for a noise that has an intensity of 9.9 × 10-5 watts/m2?
horsena [70]

Given: Sound Intensity ( I ) = 9.9 \times  10^{-5}\frac{watts}{m^2}

We know,  the approximate threshold of human hearing is at 1kHz. In watts/m^2 it's value is =\frac{9.9 \times  10^{-5}}{10^{-12}}⁻¹² W/m².

So, we can say,  Reference sound intensity(I_0) = 10⁻¹² W/m².

We have formula for "sound intensity level LI in dB" when entering sound intensity.

LI = 10×log (I / Io)  in dB

Plugging values of I and Io in formula.

LI = 10 × log (\frac{9.9 \times  10^{-5}}{10^{-12}})

LI = 10 × log (99000000)

= 10 × 7.99564

LI = 79.96 dB.

Therefore,  79.96 dB is the sound level for a noise that has an intensity of 9.9 × 10-5 watts/m2.

8 0
3 years ago
Find the quotient 22,509 /369
Rudik [331]

Answer:

61

Step-by-step explanation:

Use a calculator. It is way faster than Brainly. Please.

4 0
3 years ago
Read 2 more answers
carla and mikela went to the county fair and saw pumpkin on scales. carlas pumpkim weighed 9 pounds.carlas pumpkin weighed 7 pou
blagie [28]

Answer:

The combined weight of the pumpkin is 25 pounds.

Step-by-step explanation:

If Carla's pumpkin weighs 9 pounds and her pumpkin weighs 7 pounds less than Mikela's pumpkin, then you would add 7 to carlas pumpkin and that would equal 16. then, you would add 16 and 9 together to get the combined weight of the pumpkin.

5 0
3 years ago
Help asap I will give u huge amount of brainly points
Minchanka [31]

Answer:

\boxed{\sf -\dfrac{5}{8}}

Use BODMAS rule,

where:

  • brackets
  • order
  • division
  • multiplication
  • addition
  • subtraction

Given expression:

\rightarrow \sf -\dfrac{1}{5} \times [\:4-14\times\left(\dfrac{1}{4} \right)^2]

simplify exponent

\rightarrow \sf -\dfrac{1}{5} \times [\:4-14\times\left(\dfrac{1}{16} \right)]

\rightarrow \sf -\dfrac{1}{5} \times [\:4-\(\dfrac{14}{16}]

\rightarrow \sf -\dfrac{1}{5} \times [\:4-\(\dfrac{7}{8}]

\rightarrow \sf -\dfrac{1}{5} \times [\:\dfrac{32}{8} -\(\dfrac{7}{8}]

\rightarrow \sf -\dfrac{1}{5} \times [\:\dfrac{25}{8}]

multiply fractions

\rightarrow \sf -\dfrac{25}{40}

\rightarrow \sf -\dfrac{5}{8}

8 0
2 years ago
Read 2 more answers
ursula earns $9 per hour. to write an expression that tells how much money ursula earns for h hours, josh wrote 9\h. sarah wrote
notsponge [240]
The important information's already given in the question can be used to find the correct answer.
In 1 hour Ursula earns = 9 dollars
So
In h hours Ursula earns = (9/1) * h dollars
                                       = 9 * h hours
                                       = 9h hours
So we have found from the above discussion that Sarah wrote the correct answer and it was 9h. I hope you are satisfi3ed with the answer and the explanation that I have provided. You can use this procedure for solving similar problems.



3 0
3 years ago
Read 2 more answers
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