Astudent is given the problem: x^3+7x+9=0 . which of the following statements is false?

a.
completing the square cannot be used to solve the given equation.
b.
completing the square can only be used to solve a quadratic equation.
c.
completing the square can be used to solve the given equation.
d.
completing the square cannot be used because of the x^3

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.