Suppose a savings account offers a 677% interest rate compounded semiannually. If Samantha opens an account with $0.8 and makes other deposits or withdrawals, how much interest will she have earned after 9 years?

If the endpoints of the diameter of a circle are (8, 6) and (2,0), what is the standard form equation of the circle? a) (x + 5)2 + (y + 3)2 = 18 (x + 5)2 + (y + 3)2 = 3.72 (x - 5)2 + (y - 3)2 = 18 d) (x - 5)2 + (y - 3)2 = 32