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bazaltina [42]
2 years ago
6

NO LINKS!!! Please help fill in the blanks. Part 10a.​

Mathematics
1 answer:
pogonyaev2 years ago
4 0

Sound level is measured in <u>  decibels  </u> (dB).

The equation \beta = 10\log\left(\frac{I}{I_0}\right), where I_0 is the intensity of the <u>   threshold  </u> sound a human can hear (10^{-12} \text{watts}/\text{meter}^2) and I is the <u>   intensity    </u> of the sound being measured, gives the sound level, \beta

Example:

What was the intensity of the launch of NASA's Saturn V rocket, about 200 dB?

\beta = 10\log\left(\frac{I}{I_0}\right)\\\\\text{Substitute.} \ 200 = 10\log\left(\frac{I}{10^{-12}}\right)\\\\\text{Isolate the log.} \ 20 = \log\left(\frac{I}{10^{-12}}\right)\\\\\text{Rewrite into exponential form.} \ \frac{I}{10^{-12}} = 10^{20}\\\\\text{Solve for the variable}\\ \ I = (10^{20})(10^{-12}) = 10^8 = 100,000,000 = \text{100 million watts/}m^2

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Zina [86]

Answer: 40 degrees

Step-by-step explanation:

4 0
3 years ago
B Given: m AB =m BC , m∠x=60°, m∠y=15° Find: m AC
MArishka [77]

Answer:

105

Step-by-step explanation:

because all the angles added up have to = 180

60+15=75

75-180=105

3 0
3 years ago
7,301,985 and 7,338 what is the difference of the digit 7 in each number
Montano1993 [528]

Answer:

The difference in 7,301,985 is that the 7 is in the Millions place. And the difference in 7,338 is that that 7 is in the thousands place.

Hope this helps ☝️☝☝

6 0
3 years ago
I WILL MARK BRAINLIEST !!! Harper is going to invest $6,900 and leave it in an account for 12 years. Assuming the
Komok [63]

Answer:

4.4%

Step-by-step explanation:

A=P\left(1+\frac{r}{n}\right)^{nt}

A=P(1+  

n

r

​  

)  

nt

 

Compound interest formula

A=11700\hspace{35px}P=6900\hspace{35px}t=12\hspace{35px}n=365

A=11700P=6900t=12n=365

Given values

11700=

11700=

\,\,6900\left(1+\frac{r}{365}\right)^{365(12)}

6900(1+  

365

r

​  

)  

365(12)

 

Plug in values

11700=

11700=

\,\,6900\left(1+\frac{r}{365}\right)^{4380}

6900(1+  

365

r

​  

)  

4380

 

Multiply

\frac{11700}{6900}=

6900

11700

​  

=

\,\,\frac{6900\left(1+\frac{r}{365}\right)^{4380}}{6900}

6900

6900(1+  

365

r

​  

)  

4380

 

​  

 

Divide by 6900

1.695652174=

1.695652174=

\,\,\left(1+\frac{r}{365}\right)^{4380}

(1+  

365

r

​  

)  

4380

 

\left(1.695652174\right)^{1/4380}=

(1.695652174)  

1/4380

=

\,\,\left[\left(1+\frac{r}{365}\right)^{4380}\right]^{1/4380}

[(1+  

365

r

​  

)  

4380

]  

1/4380

 

Raise both sides to 1/4380 power

1.000120571=

1.000120571=

\,\,1+\frac{r}{365}

1+  

365

r

​  

 

-1\phantom{=}

−1=

\,\,-1

−1

Subtract 1

0.000120571=

0.000120571=

\,\,\frac{r}{365}

365

r

​  

 

365\left(0.0001206\right)=

365(0.0001206)=

\,\,\left(\frac{r}{365}\right)365

(  

365

r

​  

)365

Multiply by 365

0.044008415=

0.044008415=

\,\,r

r

4.4008415\%=

4.4008415%=

\,\,r

r

7 0
3 years ago
Read 2 more answers
Two friends race against each other in 100-meter and 800-meter races. Of the 200 races they ran this year, the wins, losses, and
docker41 [41]
<span>Let makes the table neater. event D= 100m, even E=800m
                                             (Event D) (Event E) 
A won the race (Event A)     30           50
B won the race (Event B)     60           25 
A and B tied (Event T)          10            25</span>

B did not win the race today. What length of the race was it more likely to have been? The question is asking in what event did the chance of B did not win(lose + ties) is more likely. Then, you need to determine the chance for B did not win <span>in both race.
Chance of B </span>did not win <span>100-m= 30+10/10=40%
</span>Chance of B did not win 800-m= 50+25/10=75%

The difference would be 75%-40%=35% more likely to lose 800-m race
4 0
3 years ago
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