Give the step-by-step reasoning process and then the final answer. Adam teaches 50 students a year. How many students will Adam teach in 10 years if in the first year he only teaches 40 students?
Adam will teach 50 * 9 = 450 students in 9 years. So, in 10 year Adam will teach 450 + 40 = 490 students.
The final answer: 490.