Looking for the exact value of sin(2arccos(2/25)) : )

Based upon past experience, barry expects no overdrafts. he expects no 2nd copies of statements. barry estimates that he will use network atms about 5 times a month with either bank. barry decides in the end to choose eecu. assuming that both banks provide the necessary services equally well, and based upon the tables of fees given above, how much can barry reasonably expect to save annually by choosing eecu in this case over e-town bank? a. $72 b. $78 c. $144 d. $24

Given right triangle xyz, which correctly describes the locations of the sides in relation to

Does the point (1, sqrt 7) lie on circle shown.