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frutty [35]
2 years ago
7

Simplify: (x1/2y3)6 A) x12y18 B) x12y9 C) x3y18 D) x3y9

Mathematics
1 answer:
MAXImum [283]2 years ago
7 0
The Answer is C




Reason
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Several years​ ago, 39​% of parents who had children in grades​ K-12 were satisfied with the quality of education the students r
BaLLatris [955]
<h2>Answer with explanation:</h2>

Let p be the population proportion  of parents who had children in grades​ K-12 were satisfied with the quality of education the students receive.

Given : Several years​ ago, 39​% of parents who had children in grades​ K-12 were satisfied with the quality of education the students receive.

Set hypothesis to test :

H_0: p=0.39\\\\H_a :p\neq0.39

Sample size : n= 1055

Sample proportion : \hat{p}=\dfrac{466}{1055}=0.441706161137\approx0.44

Critical value for 95% confidence : z_{\alpha/2}=1.96

Confidence interval : \hat{p}\pm z_{\alpha/2}\sqrt{\dfrac{p(1-p)}{n}}

0.44\pm (1.96)\sqrt{\dfrac{0.39(1-0.39)}{1055}}\\\\0.44\pm0.0299536805135\\\\0.44\pm0.03\\\\=(0.44-0.03, 0.44+0.03)\\\\=(0.41,\ 0.47)

Since , Confidence interval does not contain 0.39.

It means we reject the null hypothesis.

We conclude that 95​% confidence interval represents evidence that​ parents' attitudes toward the quality of education have changed.

8 0
3 years ago
A surgery asks 25 people if they prefer brand A of brand B laundry detergent. The data show that 12 people prefer brand A. Write
SVETLANKA909090 [29]

Answer:

13 to 25

13:25

\frac{13}{25}

Step-by-step explanation:

All of these show the ratio 13/25

Hope this helps!

8 0
2 years ago
Electronics Warehouse is having a blowout sale. A television that normally sells for $275 is on sale for 30% off. How much is th
telo118 [61]
The 30% off is $82.50 cheaper. Which would be $192.50
4 0
3 years ago
Read 2 more answers
Pleaseee help quickly !!!!
lisabon 2012 [21]

Let's solve your equation step-by-step.

(− 5 /8 )(x)=−160

Step 1: Simplify both sides of the equation.

−5 /8

x=−160

Step 2: Multiply both sides by 8/(-5).

( 8 /−5 )x( −5 /8 x)=( 8/ −5 )*(−160)

x=256

Answer:

x=256

8 0
3 years ago
Plz help me!!!!!!!!!!!!!!!!!!!!
miss Akunina [59]
There are 5 dimes and 13 nickels
5 0
3 years ago
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