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3 years ago

Help find the domain pls i’ll rate beainliest

Mathematics

1 answer:

kvv77 [185]3 years ago

6 0

Answer: D (-∞, ³⁄₂)

1. Find non - negative values for radicals. x ≤ ³⁄₂

2. Find undefined (singularity) points. x = ³⁄₂

3. Combine real regions and undefined points for final domain.

Final answer: x < ³⁄₂

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20 points!<br> I need help!<br> I will also be doing a 50 point giveaway later!

Pachacha [2.7K]

Answer:

1) 9

2)5.85

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

Jonah wants to construct a confidence interval using 90% confidence to estimate what proportion of silicon wafers at his factory

Nimfa-mama [501]

Answer:

170

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

The margin of error is of:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

Assume:

$\pi = 0.06$

90% confidence level

So $\alpha = 0.1$ , z is the value of Z that has a pvalue of $1 - \frac{0.1}{2} = 0.95$ , so $Z = 1.645$ .

What is the smallest sample size required to obtain the desired margin of error?

This is n for which M = 0.03. So

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$0.03 = 1.645\sqrt{\frac{0.06*0.94}{n}}$

$0.03\sqrt{n} = 1.645\sqrt{0.06*0.94}$

$\sqrt{n} = \frac{1.645\sqrt{0.06*0.94}}{0.03}$

$(\sqrt{n})^2 = (\frac{1.645\sqrt{0.06*0.94}}{0.03})^2$

$n = 169.6$

Rounding up, 170.

4 0

3 years ago

Write the equation of the following line in slope-intercept form

sukhopar [10]

Answer:

y = 2/5x + 4

Step-by-step explanation:

Points on the line:

(0,4) and (5,6)

Slope formula:

m=(y2-y1)/(x2-x1)

m=(6-4)/(5-0)

m= 2/5

y - y1 = m(x - x1)

y - 4 = 2/5(x - 0)

y - 4 = 2/5x

y = 2/5x + 4

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3 years ago

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Phil ate 2/5 of a pizza. caroline ate 1/4 of a pizza. how much did they eat in all? a) 1/3 pizza b)2/9 pizza c) 13\20 pizza d) 1

Karolina [17]

c. 13/20 pizza because in all is key for addition, so 2/5 + 1/4 = 13/20 pizza

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3 years ago

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A manufacturer plans on building a better mousetrap. There is a 60% chance the mouse trap will produce a profit of $200,000 for

Vlada [557]

The answer is
<span>C) The expected value is $100,000, so the company should build the mousetrap. </span>

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4 years ago