Solve the problem.How many different 4-letter radio-station call letters can be made if the first letter must be K or W, repeats are allowed, but the call letters cannot end in an O?
A. 33,800
B. 16,900
C. 35,152
D. 456,976
Answer: A
Mathematics
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Find the simplest form of a second-order homogeneous linear differential equation that has the given solution.y = c1e-8x + c2e-5x
A. D2y + 13Dy + 40y = 0 B. D2y + 13Dy - 40y = 0 C. D2y - 13Dy - 40y = 0 D. D2y - 13Dy + 40y = 0
Mathematics
Perform the indicated operation. Express your answer in simplest form.
- 
A. 
B. 
C. 
D. 
Mathematics
Given that ? is an angle in standard position whose terminal side contains the given point, provide the exact value of the indicated function.(-20, 48); sin ?
A. - 
B. 
C. - 
D. 
Mathematics
Use the quadratic formula to find the exact solutions.x2 = 19 + 3x
A. 3, 19
B. 3 ± 
i
C. 
D. 
± 
i
Mathematics