Solve the equation.5y = 80
A. 17
B. 16
C. 19
D. 18
Answer: B
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Find all the first order partial derivatives for the following function.f(x, y, z) = cos x sin2 yz
A. 
= -sin x sin2 yz; 
= z cos x sin yz cos yz; 
= y cos x sin yz cos yz
B. 
= -sin x sin2 yz; 
= 2z cos x sin yz cos yz ; 
= 2y cos x sin yz cos yz
C. 
= sin x sin2 yz; 
= -2z cos x sin yz cos yz; 
= - 2y cos x sin yz cos yz
D. 
= sin x sin2 yz; 
= - cos x sin yz cos yz; 
= -cos x sin yz cos yz
A computer password is made up of five characters. Each character can be a capital letter (A through Z) or a digit (0 through 9).How many passwords consist entirely of letters?
A. 26 × 25 × 24 × 23 × 22 B. 526 C. 265 D. 26 × 5 E. none of these
Solve the equation.16t3 - 36t = 0
A. 
B. - 
, 
C. - 
, 
, 0
D. 0
Solve the problem.How many 6-letter codes can be formed using the letters A, B, C, D, E, F, G, H, and I. Repeated letters are allowed.
A. 10,077,696 B. 84 C. 60,480 D. 531,441