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viva [34]
2 years ago
11

Sum of interior angles in a polygon is 3240. How many sides are in the polygon?

Mathematics
1 answer:
Aleks04 [339]2 years ago
7 0

Answer:

20

Step-by-step explanation:

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The American Psychological Associated conducted a survey in 2003 of psychologists to estimate the average incomes for psychologi
Alex Ar [27]

This question is incomplete, the complete question;

The American Psychological Associated conducted a survey in 2003 of psychologists to estimate the average incomes for psychologists based on their academic degree and years of experience. 36 psychologists responded who had a just received their masters degree in 2003. The average was $48,800 with a standard deviation of $16,800.

The 95% Confidence Interval is ($, $ )

Answer:

at 95%, confidence interval is ( $43312, $54288 )

Step-by-step explanation:

Given the data in the question;

sample size n = 36

mean x' = 48,800

standard deviation σ = 16,800

at 95% confidence level;

∝ = 1 - 95% = 1 - 0.95 = 0.05

∝/2 = 0.05 / 2 = 0.025

z critical value, Z_{\alpha/2 = 1.96

now, confidence interval for population mean is given by the formula

x' ±  Z_{\alpha/2( σ/√n )

so we substitute

⇒ 48800 ±  1.96( 16800/√36 )

⇒ 48800 ±  1.96( 2800 )

⇒ 48800 ±  5488

⇒ 48800 -  5488, 48800 +  5488

⇒ ( 43312, 54288 )

Therefore, at 95%, confidence interval is ( $43312, $54288 )

6 0
2 years ago
What is 9/12 simplified
Assoli18 [71]
9 and 12 have a common factor of 3 so 9/12 = 3/4
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3 years ago
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Please help answer all of the following multi-step equations
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Answer: first one x <-2

second one x>1

third one Use the given functions to set up and simplify

(1-4x)-x.32+4x<-3=(1-4x)-x= -5x+1

fourth one

13/14

Step-by-step explanation:

I can't rlly explain I just do, I hope this helps

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25 points and brainliest for whoever answers CORRECTLY.
o-na [289]

Answer:

a kite or a quadrilateral itself

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Mia's outfit is having a sale. If Sam buys 3 shirts at the regular price, he will get 2 free shirts. How much will each shirt co
Dominik [7]

Answer: 3/5

Step-by-step explanation:

The price of 1 shirt is x and 5 shirts is 5x but she pays for only 3 of them. You would divide 5 by 3 giving you 3/5 which would be the cost of all the shirts

8 0
3 years ago
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