Solve.The profits (in millions) for a company for 8 years were as follows: 
Which of the following polynomials is the best model for this data?
A. P(x) = 0.03x3 - 0.3x2 + 1.3x + 0.17
B. P(x) = -0.03x4 - 0.3x2 + 1.3x + 0.17
C. P(x) = 0.05x2 - 0.8x + 6
D. P(x) = -0.08x3 + 7x2 + 1.3x - 0.18
Answer: A
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Solve the problem.Two tracking stations are on the equator 140 miles apart. A weather balloon is located on a bearing of 
from the western station and on a bearing of 
from the eastern station. How far is the balloon from the western station? Round to the nearest mile.
A. 751 mi B. 742 mi C. 659 mi D. 668 mi
Solve the system of equations by using the inverse of the coefficient matrix if it exists and by the echelon method if the inverse doesn't exist. 3x + y = 15-2x + 5y = -27
A. (-3, 6) B. (-3, -6) C. No inverse, no solution for system D. (6, -3)
The currents in an electrical network are given by the solutions of the system
where I1, I2, and I3 are measured in amperes. Solve the system of equations using matrices.
A. no solution B. I1 = 3, I2 = 3, I3 = 7 C. I1 = 5, I2 = 4, I3 = 9 D. I1 = 3, I2 = 3, I3 = 6 E. I1 = 5, I2 = 9, I3 = 4
Find the product.-6(13)
A. 9 B. -78 C. -18 D. 60