Alex skateboards at a constant speed from his house to school 3.8 miles away. It takes him 18 minutes. What fraction represents his constant speed, C? what fraction represents his speed.?

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?