Evaluate the determinant.
A. -bc
B. a - bc
C. bc
D. a + bc
Answer: C
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Solve the system of equations by the substitution method.
A. (7, 2) B. (-8, 2) C. (8, 1) D. no solution
Use a graphing calculator to find the coordinates of the turning points of the graph of the polynomial function in the indicated domain interval. Give answers to the nearest hundredth.f(x) = -x4 + 29x2 - 100; [3, 4]
A. (-4, 110.25) B. (5, 887.50) C. (3.81, 110.25) D. (0, 100)
Solve the equation.
= 
A. 4 B. 0 C. No solution D. -4
Solve the problem.A company installs 5000 light bulbs. Each bulb has an average life of 500 hours with a standard deviation of 100 hours. The life of each bulb is approximated by a normal curve. Find the number of bulbs that can be expected to last between 290 hours and 540 hours.
A. 1641 B. 3188 C. 3190 D. 1639