Simplify the root.
A. Not a real number
B. -6
C. 6
D. 36
Answer: C
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Solve the equation for the interval [0, 2?).cos2x + 2 cos x + 1 = 0
A. x = 
, 
B. x = 
, 
C. x = ?
D. x = 2?
Solve the problem.To save for retirement, you decide to deposit $2500 into an IRA at the end of each year for the next 40 years. If the interest rate is 9% per year compounded annually, find the value of the IRA after 40 years. (Round to the nearest dollar.)
A. $30,413,398 B. $844,706 C. $772,666 D. $76,024
Write the system of linear equations represented by the augmented matrix. Use x, y, and z as the variables.
A. 
B. 
C. 
D. 
Find the numbers at which f is continuous. At which numbers is f discontinuous?f(x) = 
A. continuous for all real numbers except x = 0 B. continuous for all real numbers except x = 5 C. continuous for all real numbers D. continuous for all real numbers except x = -5, x = 5