Find a formula for the function graphed.
A. f(x) = 
B. f(x) = 
C. f(x) = 
D. f(x) = 
Answer: B
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Find the derivative.y = 
A. - 3x(1 - 4x)2/3
B. 
C. 
D. 
Solve the problem.Find the value of a retirement savings account paying an APR of 5.8% after 45 years (contributions made at the end of each year, including the last year) when the annual contribution is $840. Round your answer to the nearest cent.
A. $150,293.50 B. $168,624.83 C. $158,587.63 D. $149,099.04 E. $179,245.06
Solve the system by the addition method. If there is no solution or an infinite number of solutions, so state. Use set notation to express the solution set.
A. no solution; ?
B. {(-3, -6)}
C. infinitely many solutions; {
6x + 3y = -1} or {
-30x - 15y = 5}
D. {(-6, -3)}
Find the exact value of the logarithmic expression.log9 
A. 81 B. 3 C. -3 D. -81