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2 years ago

Which function is graphed below? d(x)= √-2-x f(x)=√2+x g(x)= √2+x h(x) = √2-xX

Mathematics

1 answer:

aksik [14]2 years ago

3 0

Answer:

g(x) = $\sqrt{2+x}$

Step-by-step explanation:

We can see that the graph is beginning at (-2; 0), then the domain of defintion needs to be [-2; +inf], the only function that satisfies this is that function!

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Step-by-step explanation:

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3 years ago

Salaries of 49 college graduates who took a statistics course in college have a mean, x overbar, of $ 65 comma 300. Assuming a

Molodets [167]

Answer: $60,540< \mu$

Step-by-step explanation:

The confidence interval for population mean is given by :-

$\overline{x}-z^*\dfrac{\sigma}{\sqrt{n}}< \mu$

, where $\sigma$ = Population standard deviation.

n= sample size

$\overline{x}$ = Sample mean

z* = Critical z-value .

Given : $\sigma=\$17,000$

n= 49

$\overline{x}= \$65,300$

Two-tailed critical value for 95% confidence interval = $z^*=1.960$

Then, the 95% confidence interval would be :-

$65,300-(1.96)\dfrac{17000}{\sqrt{49}}< \mu$

$=65,300-(1.96)\dfrac{17000}{7}< \mu$

$=65,300-4760< \mu$

$=60,540< \mu$

Hence, the 95% confidence interval for estimating the population mean $(\mu)$ :

$60,540< \mu$

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3 years ago