Find the focus and directrix of the parabola.- 
x2 = y
A. (0, -10); y = 10
B. (-20, 0); x = 10
C. (0, 10); y = -10
D. (0, -10); y = -10
Answer: A
Mathematics
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Use integration by parts to establish a reduction formula for the integral.
, n ? 1
A. 
= 
tann-2 x - 
B. 
= tann-1 x - 
C. 
= 
tann-1 x - 
D. 
= 
tann-1 x + 
Mathematics
Solve.A picture frame has a perimeter of 30 in. and a diagonal of 
in. What are the dimensions?
A. 3 in. by 13 in. B. 2 in. by 13 in. C. 2 in. by 12 in. D. 3 in. by 14 in.
Mathematics
Determine whether the line integral 
is positive, negative or zero.
A. positive B. negative C. zero
Mathematics
Provide an appropriate response.Perform the indicated operation, rationalize denominator, and simplify: 
Fill in the blank(s) with the appropriate word(s).
Mathematics