For the equation y = 2x2 - 5x + 18, choose the correct application of the quadratic formula.
x--5+/(-5)2 - 4(2)(18)
2(2)
x=5+ (-5)2 - 4(2)(18)
o no a
2(2)
x--23 V(2)2 - 4(-5)(18)
2(-5)
X-24V(2)2 - 4(-5)(18)
2(-5)

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.