a piece of machinery valued at $25,000 depreciates at a steady rate of 10% yearly what will the value of the piece of machinery be after 7 years​

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?