Find the area of the surface obtained by rotating the circle 
about the line y=5.
d. 
Mathematics
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Solve the quadratic equation using completing the square.x2 = 20x + 100
A. no real solution
B. {10 - 10
, 10 + 10
}
C. {-10 - 10
, -10 + 10
}
D. {-30, 30}
Mathematics
Graph the function f(x) over the given interval. Partition the interval into 4 subintervals of equal length. Then add to your sketch the rectangles associated with the Riemann sum 
, using the indicated point in the kth subinterval for ck.f(x) = -2x2, [0, 4], midpoint
A. 
B. 
C. 
D. 
Mathematics
Graph the piecewise function.f(x) = 
A. 
B. 
C. 
D. 
Mathematics
Divide and simplify.
÷ 
A. 
B. 
C. 
D. 
Mathematics