A student gives ab3 as an answer when asked to What is write the expression ab. ab. ab using
Exponents. What is the student's error?

In the diagram of circle o, what is the measure of zabc?

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?

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)