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aliya0001 [1]
2 years ago
7

Please help I will give brainliest A.3 B.6 C. 9 D. 12

Mathematics
2 answers:
Lapatulllka [165]2 years ago
4 0

Answer:

Step-by-step explanation:

I don't know if this is right but I tried my best, the left radius should be 0.95, then the right side should probably be 1.91, my guess is probably 3? If not, it should be 9.

Katyanochek1 [597]2 years ago
3 0

Answer:

A is the answer

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: Your experience indicates that offering a discount in your emails increases responses by 80%. Your last email, without a disco
timofeeve [1]
For this case we can make the following rule of three:
 23000 -------> 100%
 x --------------> 180%
 Clearing the value of x we have:
 x = (180/100) * (23000)
 x = 41400
 Answer:
 
you would expect about:
 
a) 41,400 responses
8 0
3 years ago
Question is in the picture please help
kotykmax [81]

Answer:

1808.64

Step-by-step explanation:

Area of a circle: Pi(r²)

3.14(24²)

1808.64

5 0
2 years ago
A researcher selects two samples of equal size and computes a mean difference of 1.0 between the two sample means. If the pooled
s344n2d4d5 [400]

Answer:

The Cohen's D is given by this formula:

D = \frac{\bar X_A -\bar X_B}{s_p}

Where s_p represent the deviation pooled and we know from the problem that:

s^2_p = 4 represent the pooled variance

So then the pooled deviation would be:

s_p = \sqrt{4}= 2

And the difference of the two samples is \bar X_a -\bar X_b = 1, and replacing we got:

D = \frac{1}{2}= 0.5

And since the value for D obtained is 0.5 we can consider this as a medium effect.  

Step-by-step explanation:

Previous concepts

Cohen’s D is a an statistical measure in order to analyze effect size for a given condition compared to other. For example can be used if we can check if one method A has a better effect than another method B in a specific situation.

Solution to the problem

The Cohen's D is given by this formula:

D = \frac{\bar X_A -\bar X_B}{s_p}

Where s_p represent the deviation pooled and we know from the problem that:

s^2_p = 4 represent the pooled variance

So then the pooled deviation would be:

s_p = \sqrt{4}= 2

And the difference of the two samples is \bar X_a -\bar X_b = 1, and replacing we got:

D = \frac{1}{2}= 0.5

And since the value for D obtained is 0.5 we can consider this as a medium effect.  

7 0
3 years ago
Item 8 Solve for x. Use the quadratic formula. 2x2−5x−9=0 Enter the solutions, in simplified radical form, in the boxes.
Lubov Fominskaja [6]

Answer:

5+√97/4

Also 5-√97/4

Step-by-step explanation:

The Quadratic formula is x=-b+-√b^2-4ac/2a

This means that we should plug the values for A B AND C into the formula

We can work out that

<u><em>A = 2</em></u>

<u><em>B=-5</em></u>

<u><em>C=-9</em></u>

Once we have put these into the formula we get

5+√97/4 (all over 4) aka 3.71

Also 5-√97/4 (all over 4) aka -1.21

7 0
3 years ago
Read 2 more answers
-1/6 + ( -3/7) = <br><br> A. -25/42<br> B. -4/13<br> C. 11/42<br> D. 2/13
alekssr [168]

Answer: the anwser is A

Step-by-step explanation:

I used a calculator lol

6 0
3 years ago
Read 2 more answers
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