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irina1246 [14]
3 years ago
10

Can somebody explain to me how to do this

Mathematics
1 answer:
11111nata11111 [884]3 years ago
3 0

Answer:below hopes it helps the link should help aswell

Step-by-step explanation:

https://mathsolver.microsoft.com/en/solve-problem/%60frac%7B%2010%20%7B%20q%20%20%7D%5E%7B%205%20%20%7D%20%20%20%7B%20w%20%20%7D%5E%7B%207%20%20%7D%20%20%20%20%7D%7B%202%20%7B%20w%20%20%7D%5E%7B%203%20%20%7D%20%20%20%20%7D%20%20%20%60frac%7B%204%20%7B%20%60left(%20%7B%20q%20%20%7D%5E%7B%206%20%20%7D%20%20%20%60right)%20%7D%5E%7B%202%20%20%7D%20%20%20%20%7D%7B%20%20%7B%20w%20%20%7D%5E%7B%20-5%20%20%7D%20%20%20%20%7D

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One of the loudest sounds in recent history was that made by the explosion of Krakatoa on August 26-27, 1883. According to barom
liraira [26]

Answer:

150.51 dB

Step-by-step explanation:

Data provided in the question:

decibel level of sound at 161 km distance = 180 dB

d₁ = 161 km

d₂ = 4800 km

I₁ = 180 db

The formula for intensity of sound is given as:

I = 10\log(\frac{I_2}{I_1})

and the relation between intensity and distance is given as:

I ∝ \frac{1}{d^2}

or

Id² = constant

thus,

I₁d₁² = I₂d₂²

or

\frac{I_2}{I_1}=\frac{d_1}{d_2}

therefore,

I = 10\log(\frac{d_1}{d_2})^2

or

I = 10\times2\times\log(\frac{161}{4,800})

or

I = 20 × (-1.474)

or

I = -29.49

Therefore,

the decibel level on Rodriguez Island, 4,800 km away

= 180 - 29.49

= 150.51 dB

8 0
3 years ago
Question 26<br> y<br> What is y when x is 33?<br> ROUND YOUR ANSWER TO THE NEAREST HUNDRETH.
Katarina [22]

Answer:

y = 4.13

Step-by-step explanation:

Plux in x = 33 into y = 1/8x.

y = 1/8(33)

y = 4.125

Round to the nearest hundreth.

y = 4.13

4 0
3 years ago
A pair of shoes usually sell for $63. If the shoes are 40% off, and a sale tax of 7% is allied to discount cost, what is the tot
faust18 [17]

Answer:

$42

Step-by-step explanation:

40% of $63 is $25.2

$63 - $25.2 = $37.8

How much your paying without tax 37.8

7% of $63 is $4.41.

$37.8 + $4.41 = $42.21

Rounded 42.21 = 42

Im not 100% sure about the rounding but I hope this helps!

6 0
3 years ago
What is the slope of the line passing through the points (−1, 7) and (4, −1)?
Damm [24]

Hey!

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

Formula: m = \frac{y2 - y1}{x2 - x1}

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

Steps To Solve:

~Substitute

m = \frac{-1 - 7}{4 - (-1)}

~Simplify

m = \frac{-8}{5}

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

Answer:

\large\boxed{C)~\frac{-8}{5} }

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

Hope This Helped! Good Luck!

3 0
3 years ago
Read 2 more answers
What are equivalent ratios to 33:11?
V125BC [204]
3:1, 6:2, 9:3, 12:4, 15:5, and it just keeps going!
8 0
3 years ago
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