A sample of 25 different payroll departments found that the employees worked an average of 310.3 days a year with a population standard deviation of 23.8 days. Assuming the distribution is approximately normal, find the 90% confidence interval for the average number of days worked for all payroll departments. Round to final answers to one decimal place.

When you arrive at the lake, your friend realises he hasn’t got any swimming trunks. you need to ride to a sports shop. the sports shop is 8350 metres away. how many metres is it to cycle there and back?

Adam plans to choose a video game from the section of the store where everything is 75% off. he writes the expression d-0.75d to find the sale price of the game if the original price is d dollars. gena correctly writes another expression, 0.25d, that will also find the sale price of the game if the original price is d dollars. use the drop down menus to explain each part of adams and rena's expression

What is the definition of exponential decay?