Find 
.y = 6x4 - 8x2 + 5
A. 24x2 - 16
B. 24x2 - 16x
C. 72x2 - 16
D. 72x2 - 16x
Answer: C
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Find all the first order partial derivatives for the following function.f(x, y) = 
A. fx(x, y) = - 
; fy(x, y) = - 
B. fx(x, y) = - 
; fy(x, y) = - 
C. fx(x, y) = - 
; fy(x, y) = - 
D. fx(x, y) = 
; fy(x, y) = 
Provide an appropriate response.Write the two steps used to identify the greater fraction when comparing two fractions.
What will be an ideal response?
Solve the problem.The surface area S (in square inches) of a cylindrical pipe with length 12 inches is given by S(r) = 2?r2 + 24?r, where r is the radius of the piston (in inches). If the radius is increasing with time t (in minutes) according to the formula r(t) = 
t2, t ? 0, find the surface area S of the pipe as a function of the time t.
What will be an ideal response?
Write the expression in standard form. Do not use a calculator.8i - (7 + i)
A. -7 - 7i B. 7i - 7 C. 9i - 7 D. -7 + 7i