The Dallas Morning News is running a series of articles to see if the residents of Dallas still support the Mayor’s decision to block the Dallas Cowboys from moving into a new Fair Park stadium now that the city of Arlington has had an unprecedented growth. In the 10 years since the new stadium opened, the stadium has brought in far more money for taxpayers than the benefit given to the Cowboys for moving to Arlington. A SRS of 1250 Dallas adults were asked and only 76 said they still support the Mayor’s decision.

Find the appropriate critical value for the problem

Construct a 90% confidence interval to estimate the true proportion of residents who still support the Mayor’s decision. Show your work.

Is it Plausible that the true proportion is .05?

Answer and Step-by-step explanation:

A+B only 10% = = 0

95%=1302  

99% = 1377  

5% = 1188  

2.5% = 1169

A= deduct this from sample size B it is usually 5 of the vote% so in comparison would not hinder the negative we deduct 1 from the 5%. B. Margin of error is 2.5% deduction comparison was Mayor was asking for a negative outcome with a positive vote. which is biased alone. Loss of confidence due to margins.

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation:

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.