If a polynomial function f(x) has roots 0, 4, and 3 + startroot 11 endroot, what must also be a root of f(x)? 3 + i startroot 11 endroot negative 3 + i startroot 11 endroot 3 minus startroot 11 endroot negative 3 minus startroot 11 endroot

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.