Someone please help don’t know answer

Brook states that the distance on the line is 4 units. caleb states that the whole line does not have a distance because it continues on forever. vivian states that the line is 6 units long. which distance did brook measure? which distance did vivian measure?

Cody was 165cm tall on the first day of school this year, which was 10% taller than he was on the first day of school last year.

What is the value of n in the equation -1/2(2n+4)+6=-9+4(2n+1)