1. Decide whether the inverse function of g = {(–4, –1), (–2, 0), (1, –1), (2, –2)} is a function.
19. Perform the indicated operations.
(1 – 10i) – ( 3 + 2i) + (2 + 13i)
20. Solve the exponential equation for x. 7x = 49x +1
22. Find the center and radius of the circle. Then graph it. (x – 2)2 + y2 = 16
25. Find the value of the discriminant and give the number of real solutions. 4x2 + 2x + 2 = 0
26. If $5,000 is invested in a savings account with an interest rate of 9%, coumpounded annually, the amount in the account after t years is given by
A(t) = 5000(1 + 0.09)t
Use a calculator to find the amount in the account after 6 years. Round your answer to the nearest cent.