Carlos made a scale model of his house. the actual width is 30 feet, and the actual length is 45 feet.
if the model has a width of 6 inches, what i the length of the model?
a. 4 inches
b. 5 inches
c. 7 inches
d. 9 inches

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