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
Answer: B
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A. x+y B. ln x + ln y C. xy D. exey
Solve the problem.Mardi received an inheritance of $50,000. She invested part at 1.75% and deposited the remainder in tax-free bonds at 2%. Her total annual income from the investments was $925. Find the amount invested at 1.75%.
A. $30,000 B. $29,000 C. $49,075 D. $15,000
Solve the quadratic equation and simplify your answer. Use i notation for any complex numbers.
+ 
= -2
A. x = - 
, x = - 
B. x = - 
, x = 0
C. x = - 
, x = 
D. x = -2, x = - 
Factor the polynomial completely. If the polynomial cannot be factored, write "prime."81x - x5
A. x(9 + x2)(3 - x)(3 + x) B. x(x2 - 9)2 C. x(x2 + 9)2 D. prime