Solve the problem.How many different 5-letter codes are there if only the letters A, B, C, D, E, F, G, H, and I can be used and no letter can be used more than once?
A. 126
B. 15,120
C. 5
D. 59,049
Answer: B
Mathematics
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Solve. Where appropriate, include approximations to the nearest thousandth. If no solution exists, state this.log x - log(x + 4) = 1
A. 
B. - 
C. - 
D. No solution
Mathematics
Identify equilibrium values and determine which are stable and which are unstable.
= y2 - 3y
A. y = 3 is a stable equilibrium value and y = 0 is an unstable equilibrium. B. y = 0 is a stable equilibrium value and y = 3 is an unstable equilibrium. C. y = 0 and y = 3 are unstable equilibrium values. D. There are no equilibrium values.
Mathematics
Find the axis of symmetry of the parabola defined by the given quadratic function.f(x) = -x2 + 8x + 5
A. x = 4 B. x = 21 C. x = -4 D. x = 8
Mathematics
Evaluate the expression.
A. 21 B. 38 C. 19 D. 20
Mathematics