Solve the problem.The approach ramp used by a daredevil motorcyclist for flying over a collection of flaming railroad ties has a rise of 5.5 feet for every 10 feet in horizontal distance. Find the grade of the ramp. Round to the nearest whole percent.
A. 18%
B. 0.55%
C. 60%
D. 55%
Answer: D
Mathematics
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Find the center of mass of a thin plate covering the given region with the given density function.The region bounded by the parabola y = 4 - x2 and the x-axis, with density ?(x) = 2x2
A. 
= 0, 
= 
B. 
= 
, 
= 0
C. 
= 0, 
= 
D. 
= 0, 
= 
Mathematics
Simplify the expression. Express the answer so that only positive exponents occur. Assume that all variables are positive.(16x8y4)1/2
A. 4x4y B. 4x4y2 C. x4y2 D. 4x8y2
Mathematics
Which of the pictures does not illustrate a line of symmetry?
?
(A) 
(B) 
?
A. B B. A C. A and B D. Neither
Mathematics
Evaluate the limit based on the graph of f shown.
f
A. 0
B. 
C. ?
D. -?
Mathematics