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3 years ago

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:

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

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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