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vlada-n [284]
3 years ago
11

What is the measurement of arc BE?

Mathematics
1 answer:
aniked [119]3 years ago
4 0
The answer is 134 degrees
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A Confidence interval is desired for the true average stray-load loss mu (watts) for a certain type of induction motor when the
Vaselesa [24]

Answer:

A sample size of 35 is needed.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.95}{2} = 0.025

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.025 = 0.975, so z = 1.96

Now, find the width W as such

W = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

How large must the sample size be if the width of the 95% interval for mu is to be 1.0:

We need to find n for which W = 1.

We have that \sigma^{2} = 9, then \sigma = \sqrt{\sigma^{2}} = \sqrt{9} = 3. So

W = z*\frac{\sigma}{\sqrt{n}}

1 = 1.96*\frac{3}{\sqrt{n}}

\sqrt{n} = 1.96*3

(\sqrt{n})^2 = (1.96*3)^{2}

n = 34.57

Rounding up

A sample size of 35 is needed.

3 0
3 years ago
What’s the vertex g(t) = -5(x – 3)
Katena32 [7]

Answer:

Step-by-step explanation:

Actually, g(t) = -5(x – 3) is a linear function:  g(t) = -5x + 15.  Its graph is a straight line with slope -5 and y-intercept (0, 15).

8 0
3 years ago
Anthony cut a piece of metal that weighed 2,700 grams.Dianne cut a piece of metal that weighed 3,200 grams.how much heavier was
Kazeer [188]

Answer:

Dionne’s piece weight 500 grams heavier than Anthony’s

Step-by-step explanation:

8 0
2 years ago
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How do you calculate the daily periodic rate?
sdas [7]
<span>A daily periodic interest rate is calculated by dividing the annual percentage rate, or APR, by either 360 or 365, depending on the card issuer.</span>
8 0
4 years ago
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A pot of water is being heated up. The temperature of the water can be modeled by this equation with y representing the temperat
Phoenix [80]
Given function:
y=9.5x+62.1
We have to find the number of minutes x, when y=138.1°F
Put value of y in function.
138.1=9.5x+62.1
Subtract 62.1 from both sides.
76=9.5x
Divide both sides by 9.5.
8=x
or
x=8 minutes

Answer: After 8 minutes the temperature of water will be 138.1°

8 0
3 years ago
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