Solve the problem.The polynomial function 
represents the yearly income (or loss) from a real estate investment, where t is time in years. After what year does income begin to decline?
A. 8.5
B. 9.5
C. 19
D. 12.67
Answer: B
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Use a finite approximation to estimate the area under the graph of the given function on the stated interval as instructed.f(x) = x2 between x = 1 and x = 5 using an upper sum with four rectangles of equal width.
A. 54 B. 30 C. 69 D. 41
Solve the equation (x in radians and ? in degrees) for all exact solutions where appropriate. Round approximate answers in radians to four decimal places and approximate answers in degrees to the nearest tenth.cos2 x - cos x = 0
A. {? + 2n?}
B. 
C. 
D. 
Solve the rational equation.
+ 
= 
A. 0 B. 4 C. -6 D. no real solutions
Solve the problem.In a test, a teacher gives 2 points for each multiple choice question answered correctly and 5 points for each short answer question answered correctly. If Jim correctly answered x multiple choice questions and y short answer questions, write an equation that shows the possible combinations of multiple choice questions and short answer questions if he got a total of 47 points.
A. 10 + xy = 47 B. (2 + x) + (5 + y) = 47 C. 2x + 5y = 47 D. 5x + 2y = 47