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3 years ago

10

3 + 3 x 3 - 3 + 3 =?

2 answers:

kifflom [539]3 years ago

8 0

Answer:

6

Step-by-step explanation:

We are going to use PEMDAS to solve this. PEMDAS stands for Parenthesis, Exponents, Multiplication, Division, Addition, and Subtraction. You use it to determine the order of operations you use.

So there are no parenthesis or exponents, so we skip right to multiplication.

3+3 x 3 - 3 + 3

^ 3 x 3 = 9

So now we have 3+ 9 - 3 +3

There is no division, so lets move to addition.

3+9 - 3 + 3

^ 12 ^ 6 Our equation is now 12-6

12-6 = 6, so the answer to this equation is 6

SCORPION-xisa [38]3 years ago

3 0

12, 3x3 = 9, +3 =12-3=9+3=12

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Answer: a. 0.542

b. 0.051

c. $(0.491,\ 0.593)$

Step-by-step explanation:

Let p be the population proportion of parents spend too little time with their children because of work commitments

As per given , we have

n= 369

$\hat{p}=\dfrac{200}{369}=0.542005420054\approx0.542$

Since the sample proportion is the best estimate for the population proportion.

So , the point estimate of the proportion of the population of working parents who feel they spend too little time with their children because of work commitments = 0.542

z-value for 95% confidence interval : $z_{\alpha/2}=1.96$

Margin of error : $E=z_{\alpha/2}\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}$

$E=(1.96)\sqrt{\dfrac{0.542(1-0.542)}{369}}\\\\=0.0508364564574\approx0.051$

The margin of error = 0.051

Confidence interval : $\hat{p}\pm E$

$0.542\pm0.051\\\\=(0.542-0.051,\ 0.542+0.051)\\\\=(0.491,\ 0.593)$

95% confidence interval estimate of the population proportion of working parents who feel they spend too little time with their children because of work commitments : $(0.491,\ 0.593)$

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Answer:

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Step-by-step explanation:

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