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3 years ago

40 . 8- 10 exponent 2

Mathematics

2 answers:

Crazy boy [7]3 years ago

7 0

Answer:

Step-by-step explanation:

2 over 2 exponent

Mumz [18]3 years ago

4 0

Answer:

-92

Step-by-step explanation:

8 - (10^2)

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PLEASE HELP ME I AM FAILING. I WILL GIVE BRAINLIEST

Irina18 [472]

Answer:

Step-by-step explanation:

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3 years ago

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 rectangular bathroom mirror is 4

Phantasy [73]

Answer:

Step-by-step explanation:

area = width x height

area = 7 x 4

area = 28 square feet

7 0

3 years ago

Read 2 more answers

Lois is 3 years older than Oscar. The sum of their ages is no more than 20. Write an inequality that can be used to represent th

scoundrel [369]

Let Oscar be x years old
Lois is x+3 years old

ATQ

$\\ \sf\longmapsto x+x+3\leqslant 20$

$\\ \sf\longmapsto 2x+3\leqslant 20$

$\\ \sf\longmapsto 2x\leqslant=17$

$\\ \sf\longmapsto x\leqslant \dfrac{17}{2}$

5 0

2 years ago

Read 2 more answers

In a circle with a radius of 6 ft, an arc is intercepted by a central angle of 270 degrees.

aliya0001 [1]

Answer: 28.26 ft

Step-by-step explanation:

The formula to calculate the length of arc $l$ is:

$l=r \theta$

Where:

$r=6 ft$ is the radius of the circle

$\theta=270\° \frac{\pi}{180\°}=\frac{3}{2} \pi=4.71 rad$ is the angle in radians

$l=(6 ft)(4.71 rad)$

$l=28.26 ft$ This is the length of the arc

3 0

3 years ago