Solve the problem.Find out how long it takes a $3200 investment to double if it is invested at 
compounded semiannually. Round to the nearest tenth of a year. Use the formula 
.
A. 8.8 years
B. 8.6 years
C. 9.2 years
D. 9 years
Answer: A
Mathematics
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Find the GCF of 24, 27, and 30. ?
A. 10 B. 8 C. 1 D. 3
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Graph the linear inequality.3x + 5y ? 15
A. 
B. 
C. 
D. 
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Find the domain and range and describe the level curves for the function f(x,y).f(x, y) = (-2x - 10y)5
A. Domain: all points in the xy-plane; range: real numbers z ? 0; level curves: lines 
B. Domain: all points in the xy-plane; range: all real numbers; level curves: lines 
c ? 0
C. Domain: all points in the xy-plane; range: all real numbers; level curves: lines 
D. Domain: all points in the xy-plane; range: real numbers z ? 0; level curves: lines 
c ? 0
Mathematics
Solve the system.
A. (-2, -2, 5) B. (5, -2, -2) C. (-2, 5, -2) D. ?
Mathematics