Find the second-order partial derivative.Find fxy when f(x,y) = 8x3y - 7y2 + 2x.
A. 48xy
B. -14
C. 24x2
D. -28
Answer: C
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In a proportionality relationship, the constant ofproportionality varies with time.
Answer the following statement true (T) or false (F)
Solve. Determine a polynomial that represents the area of a square with sides of length 
A. 36x2 - 36xy + 9y2 B. 36x2 - 36xy - 9y2 C. 36x2 - 18xy + 9y2 D. 36x2 + 36xy + 9y2
Solve the problem.If an object is dropped, the distance it falls is given by d = 16t2. Find the distance an object would fall in 8 seconds.
A. 1024 ft B. 512 ft C. 2048 ft D. 128 ft
For the given probability density function, over the given interval, find the mean, the variance, and the standard deviation.f(x) = 
x, [0, 2]
A. ? = 
; ?2 = 
; ? = 
B. ? = 
; ?2 = 
; ? = 
C. ? = 
; ?2 = 
; ? = 
D. ? = 
; ?2 = 
; ? = 