This is due soon i am going to cry . in 1987 the average price of gasoline was $0.94. today the price of gas is about $3.00. what is the percent increase from 1987 to today?

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