These teachers chose to study the population of all students in their classes. This approach is called a census. The U. S. government conducts a census every 10 years. List some things you know about the U. S. Census.

Helll ! 1,400 tons of wheat of two different varieties was delivered to the silo. when processing one variety, there was 2% of waste and 3% during the processing of the second variety of wheat. after the processing, the amount of remaining wheat was 1,364 tons. how many tons of each variety of wheat was delivered to the silo?