Solve the problem, if possible. Round your answer to the nearest tenth, when appropriate.A parking lot measures 
by 
. A sidewalk of uniform width is to completely surround the lot. If the sidewalk can cover 
, how wide will the sidewalk be?
A. 3 ft
B. 2 ft
C. 1.5 ft
D. 2.5 ft
Answer: B
Mathematics
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Use logarithmic differentiation to find the derivative of y.y = cos x
A. cos x
B. cos x
C. 
D. cos x
Mathematics
Rationalize the denominator. Assume all variables represent positive real numbers.
A. 
+ 9
B. x - 9
C. 
- 9
D. x + 9
Mathematics
Find the value. 
A. 25.129 B. 20.141 C. 22.55 D. 36.836
Mathematics
Graph the parabola.y = -4x2 + 2x - 7
A. 
B. 
C. 
D. 
Mathematics