The length of a rectangle is two feet greater than twice its width. if the perimeter is 25 feet, find the width

What is the frequency of the sinusoidal graph?

What is the interquartile range of this day at set?

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.