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4 years ago

Please help!! I'm really confused

Mathematics

1 answer:

Readme [11.4K]4 years ago

8 0

Answer:

Point a is correct.

Step-by-step explanation:

hope I helped.

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3. A company with loud machinery needs to cut its sound intensity to 44% of its original level. By how many decibels would the l

sergeinik [125]

Answer: 3. The correct option is: A) 3.57 decibels.

6. The correct option is: B) $ln(\frac{x^2}{c^5})$ 

Step-by-step explanation:

3. Sound intensity is cut to 44% of its original level. That means, if the original sound intensity was 100, then now sound intensity will be 44.

So, $I_{0}= 100$ and $I= 44$

Using the formula $L= 10log(\frac{I}{I_{0}})$ , we will get.....

$L= 10log(\frac{44}{100})\\ \\ L= 10log(0.44)\\ \\ L= 10(-0.3565...)=-3.565...\approx -3.57$

(Rounded to the nearest hundredth)

So, the loudness would be reduced by 3.57 decibels.

6. Given expression is: $2ln(x) - 5ln(c)$

First applying the property $m*log(x)= log(x^m)$ , we will get.....

$ln(x^2)-ln(c^5)$

Now using the formula, $log(a)-log(b)= log(\frac{a}{b})$ , we will get....

$ln(x^2)-ln(c^5) = ln(\frac{x^2}{c^5})$

Thus, the answer as a single natural logarithm is $ln(\frac{x^2}{c^5})$

8 0

3 years ago

a girl has to be at school at 8:00 am it takes her 20 minutes to eat, 35 minutes to get dressed and 15 minutes to get dressed wh

mixer [17]

First find the sum of the amount of time it takes her to be finished

20 + 35 + 15 =
35 + 35 = 70

Keep in mind a hour is 60 minutes

1:10 minutes before 8:00

She should get up at 6:50am

4 0

2 years ago

Anyone know the answer , please help!

romanna [79]

Answer:

Step-by-step explanation:

Data of # posts made:

1, 1, 2, 2, 3, 5, 5, 6, 7, 7, 7, 8, 8, 9, 9, 9, 9, 10

Since we want to find the median, we find the middle number which is 7. The median is 7.

6 0

3 years ago

Find the circumference of the circle if the radius is 4 inches

Kitty [74]

Answer:

25.13

Step-by-step explanation:

C = d( $\pi$ )

d = r(2) in this case 4(2) = 8 = d

so 8( $\pi$ ) = C

C ≈ 25.13

3 0

3 years ago

Read 2 more answers

6th grade math help if u can (:

QveST [7]

Answer:

Failure

Step-by-step explanation:

A synonym is a word that has a similar or exact same meaning as another given word. The synonym for malfunction, would therefore, be failure.

3 0

4 years ago

Read 2 more answers