Solve the problem.How many 5-letter codes can be formed with the letters 
if repeated letters are allowed?
A. 56
B. 240
C. 336
D. 32,768
Answer: D
Mathematics
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Find the convergence set for the given power series. Hint: First find a formula for the nth term; then use the Absolute Ratio Test.
+ 
+ 
+ 
+ . . .
A. 2 ? x < 4 B. -1 ? x < 1 C. 0 < x < 3 D. All x
Mathematics
Use reduction formulas to evaluate the integral.
A. - 
sin 4x cos2 4x + 
+ 
sin 8x + C
B. - 
sin 4x cos3 4x + 
+ 
sin 8x + C
C. - 
sin 4x cos3 4x + 
+ 
cos 8x + C
D. - 
sin 4x cos3 4x + 
+ 
sin 8x + C
Mathematics
Use the information below to determine the indicated set. U = {q, r, s, t, u, v, w, x, y, z} A = {q, s, u, w, y} B = {q, s, y, z}(A ? B)' ? A
A. {q, s, y} B. {q, r, s, t, u, v, w, x, y, z} C. {q, s, u, w, y} D. { }
Mathematics
Solve for the variable.
= 5
A. 6 B. 2 C. 7 D. 10
Mathematics