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MaRussiya [10]
3 years ago
15

Complex Numbers in Polar Form Connexus

Mathematics
1 answer:
katrin [286]3 years ago
5 0
B I’m sure if not comment correct answer
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A city is holding a referendum on increasing property taxes to pay for a new high school. In a survey of 434 likely voters, 202
EleoNora [17]

Answer: 0.418 < p < 0.512

Step-by-step explanation: A 95% conifdence interval for a population proportion is given by:

p + z\sqrt{\frac{p(1-p)}{n} }

where:

p is the proportion

z is score in z-table

n is sample size

The proportion for people who said "yes" is

p=\frac{202}{434} = 0.465

For a 95% confidence interval, z = 1.96.

Calculating

0.465 + 1.96*\sqrt{\frac{0.465(0.535)}{434} }

0.465 + 1.96*\sqrt{0.00057}

0.465 ± 1.96*0.024

0.465 ± 0.047

Interval is between:

0.465 - 0.047 = 0.418

0.465 + 0.047 = 0.512

<u>The interval with 95% of confidence is between 0.418 and 0.512.</u>

4 0
2 years ago
PLZ HELP WILL GIVE BRAINLIEST
belka [17]

Answer: Q= (-4,3) V= (-4,7) x=(-6,7)

Step-by-step explanation:

5 0
3 years ago
Rewrite the expression by factoring out (w-5)
lara [203]

Answer:

(w - 5)(2w² + 7)

Step-by-step explanation:

Given

2w²(w - 5) + 7(w - 5) ← factor out (w - 5) from each term

= (w - 5)(2w² + 7)

5 0
3 years ago
16. Each of a group of sealed opaque envelopes contains eight bills. One envelope contains eight $1 bills, one envelope contains
Leokris [45]

Answer:

probability = 1/2

Step-by-step explanation:

Ok probability is the possibility of something happening.

So let's check the chance of $5 appearing according to how it appeared before.

4 envelopes are opened and 8 bills are inside . So total bills are 32 bills

Out of 24 bills 12 are 1$ bill

12 are $ 5 bill.

So it's a fifty fifty chance.

So the probability is 1/2

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3 years ago
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Dmitrij [34]

Answer:

a) 45°=x

b) not

................

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2 years ago
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