Solve the problem.An arrow is shot straight up from level ground. The distance (in meters) of the arrow above the ground (the position function) is f(t) = 4 + 124t - 4.9t2 at any time t (in sec). Find f '(2) and the initial velocity of the arrow.
A. f '(2) = 104.4; initial velocity = 124 m/s
B. f '(2) = -19.6; initial velocity = 124 m/s
C. f '(2) = 104.4; initial velocity = 4 m/s
D. f '(2) = 212.8; initial velocity = 124 m/s
Answer: A
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Solve the problem.The base of the closed cubelike surface is the unit square in the xy-plane. The four sides lie in the planes 
, x = 1, y = 0, and y = 1. The top is an arbitrary smooth surface whose identity is unknown. Let 
and suppose the outward flux through the side parallel to the yz-plane is 3 and through the side parallel to the xz-plane is -5. What is the outward flux through the top?
A. 2 B. -2 C. Not enough information to determine D. 0
Find the matrix product, if possible.
A. Cannot be multiplied
B. 
C. 
D. 
Add or subtract.3
+ 5
A. 16
B. 15
C. 8
D. 8
Solve the equation for y.-8x + 7y = 9
A. y = 56x + 63
B. y = 
C. y = 
D. y = 