Find the inverse, if it exists, for the matrix.
A. 
B. 
C. 
D. 
Answer: B
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Solve the problem.The position of a weight attached to a spring is s(t) = -3 cos 7t inches after t seconds. What are the frequency and period of the system?
A. Frequency = 
cycles per sec, period = 
sec
B. Frequency = 
cycles per sec, period = 
sec
C. Frequency = 
cycles per sec, period = 
sec
D. Frequency = 7 cycles per sec, period = 
sec
Use Descartes' Rule of Signs to determine the possible number of positive and negative real zeros for the function. Then, use a graph to determine the actual number of positive and negative real zeros.P(x) = -6x4 - 6x3 - 4x2 - 5x + 7
A. possible: 0 or 2 pos, 0 or 2 neg
actual: 2 pos, 0 neg
B. possible: 1 pos, 1 or 3 neg
actual: 1 pos, 1 neg
C. possible: 1 pos, 1 neg
actual: 1 pos, 1 neg
D. possible: 1 pos, 1 or 3 neg
actual: 1 pos, 1 neg
Decide whether or not the points are the vertices of a right triangle.(-10, -2), (-4, 0), (-5, -5)
A. Yes B. No
Solve the problem.A woman deposits $286 in the bank, and each month afterward deposits 3% more than the month before. Write the first four terms of the geometric sequence that gives the amount of her deposit each month.
A. $294.58; $303.42; $312.52; $321.90 B. $1.03; $1.06; $1.09; $1.13 C. $286; $858; $2574.00; $7722.00 D. $286; $294.58; $303.42; $312.52