Show coins to count back the change you would get if you bought candy for .12 cents and paid for it with a quarter. 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?

Use the graph of the sine function y=2sinθ shown below

Precalculus question, image attached.