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3 years ago

The sum of 19.3 and a number is 30.4. Which equation can be used to solve the problem?

Mathematics

2 answers:

Simora [160]3 years ago

5 0

Answer:

<h2>YOUR CORRECT ANSWER'S (B.)</h2>

Step-by-step explanation:

Viefleur [7K]3 years ago

3 0

30.4 - 19.3 =x because you see if 19.3 plus a number equals 30.4 then that must mean if u do the oppisite you get the same number so u subtract either way the solution would be 11.1

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Answer:

Step-by-step explanation:

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Answer: (1500.66,1599.34)

Step-by-step explanation:

Confidence interval for population mean:

$\overline{x}\pm z^*\dfrac{\sigma}{\sqrt{n}}$

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As per given , we have

n= 16

$\sigma = 154$ square feet

$\overline{x}= 1550$ square feet

$\alpha= 1-0.80 = 0.20$

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$1550\pm (1.2815)\dfrac{154}{\sqrt{16}}\\\\ = 1550\pm (1.2815)\dfrac{154}{4}\\\\= 1550\pm 49.33775\\\\ =(1550-49.33775,\ 1550+49.33775)\\\\\approx (1500.66,\ 1599.34)$

Required confidence interval: (1500.66,1599.34)

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3 years ago