A computer password is made up of four characters. Each character can be a capital letter (A through Z), a lowercase letter (a through z) or a digit (0 through 9).How many passwords have 3 letters (uppercase or lowercase) and only one digit?
A. 523 × 10
B. 4 × 52× 10
C. 4 × 523 × 10
D. 52 × 51 × 50 × 10
E. none of these
Answer: C
Mathematics
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Find the absolute value.
A. 0
B. - 
C. 
D. 
Mathematics
Graph the quadratic function using its vertex, axis of symmetry, and intercepts.f(x) = -x2 + 6x - 8
A. vertex (-3, -1)
intercepts (-4, 0), (- 2, 0), (0, 8)
B. vertex (3, -1)
intercepts (4, 0), (2, 0), (0, 8)
C. vertex (-3, 1)
intercepts (-4, 0), (- 2, 0), (0, -8)
D. vertex (3, 1)
intercepts (4, 0), (2, 0), (0, -8)
Mathematics
Find an equation for the ellipse described.Vertices at (-4, 5) and (12, 5); focus at (10, 5)
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
- 
= 1
Mathematics
Write as the sum and/or difference of logarithms. Express powers as factors.ln 
A. 
ln y + 
B. 4 ln y + 4
C. 
D. 
ln 
+ 
Mathematics