Sketch trajectories of solutions of z? = Az given the eigenvalues and associated eigenvectors of A. Classify the origin and assess its stability.
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Solve the problem.How long will it take a sample of radioactive substance to decay to half of its original amount, if it decays according to the function A(t) = 350e-0.169t, where t is the time in years? Round your answer to the nearest hundredth year.
A. 34.66 yr B. 59.15 yr C. 38.76 yr D. 4.10 yr
Plot the point.(2.5, -6.5)
A. 
B. 
C. 
D. 
Use a graphing calculator to find the sum.
Round your answer to three decimal places.
A. -0.667 B. 1.333 C. 4.000 D. -1.667
Solve the problem.An investment is worth $3328 in 1995. By 2000 it has grown to $4478. Let y be the value of the investment in the year x, where x = 0 represents 1995. Write a linear equation that models the value of the investment in the year x.
A. y = -230x + 3328
B. y = 230x + 3328
C. y = 
x + 3328
D. y = -230x + 5628