6 The graph of y k sin X is shown below for unknown constant k What is the x coordinate of point A 4 shown marked on the diagram 1 7k 6 5k 2 3 8 4 10 y M full by the equation V 55 cos A at maximum 7 The volume of water V in a storage tank can be modeled as a function of the number of hours since it was 77 t 67 where V represents the number of gallons of water in the tank Which of the following represents the maximum number of gallons 1 74 3 105 2 96 4 122