Ineed a moving-van rental company uses the polynomial 84 + 0.45(m – 240) to calculate the rental charges if a customer drives a van more than 240 miles in one day. in the polynomial, m is the total number of miles that the customer drove the van during the day. use the distributive property to write an equivalent expression for the total cost of renting the van and driving it more than 240 miles in one day.

The survey of study habits and attitudes (ssha) is a psychological test that measures the motivation, attitude toward school, and study habits of students, scores range from 0 to 200. the mean score for u. s. college students is about 115, and the standard deviation is about 30. a teacher who suspects that older students have better attitudes toward school gives the ssha to 55 students who are at least 30 years of age. the mean score is 113.2. assume the population standard deviation is 30 for older students what is the margin of error for a 95% confidence interval for the population mean score for a. older students? b. compute the 95% confidence interval for the population mean score for older students. c. compute the 99% confidence interval for the population mean score for older students. d. compute the 88% confidence interval for the population mean score for older students.