The length of a rectangle is 8 feet more than its width. if the width is increased by 4 feet and the length is decreased by 5 feet, the area will remain the same. set up an equation to find the answer. give detail.

Aresearch study is done to find the average age of all u. s. factory workers. the researchers asked every factory worker in ohio what their birth year is. this research is an example of a census survey convenience sample simple random sample