What is sum of the polynomials? (–3x²+x-8) and (-2x²+2x+2)?
A) -5x² + 3x + 8
C) -5x + 3x +6 D) -5x +3x-6
B) Sx?

Now, martin can reasonably guess that the standard deviation for the entire population of people at the mall during the time of the survey is $1.50. what is the 95% confidence interval about the sample mean? interpret what this means in the context of the situation where 95 people were surveyed and the sample mean is $8. use the information in this resource to construct the confidence interval.