Yolanda is using a $20 gift card at a movie rental store. the rental price for each dvd $1.50 which algebraic model describes b, the balance on yolanda's gift card after renting d dvds?

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