Which formula could be used to represent the sequence below?

Asailor is looking at a kite. if he is looking at the kite at an angle of elevation of 36and the distance from the boat to the point where the kite is directly overhead is 40 feet, how high is the kite?

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?

If 25% of y is 30, what is 60% of y?