Solve the equation with quadratic formula

Choose the more precise measurement. 26.4 cm or 8.39 cm

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.

Twice the sum of a number and 2 is equal to three times the difference of the number and 8. find the number.