Find the equation of the parabola described.Focus at (0, -15); directrix the line y = 15
A. x2 = 60y
B. x2 = -60y
C. y2 = -15x
D. y2 = -60x
Answer: B
Mathematics
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Find the volume of the described solid.The base of a solid is the region between the curve y = 3cos x and the x-axis from x = 0 to x = ?/2. The cross sections perpendicular to the x-axis are isosceles right triangles with one leg on the base of the solid.
A. 
?
B. 
?
C. 
?
D. 2?
Mathematics
Simplify the expression so that no negative exponents appear in the final result. Assume all variables represent nonzero numbers.(72 ? 65)-3
A. 
B. 
C. 77 ? 67
D. 76 ? 615
Mathematics
Determine algebraically whether the function is even, odd, or neither.f(x) = 5x3 + 2
A. even B. odd C. neither
Mathematics
Provide an appropriate response.Is it true that fxy(a, b) = fyx(a, b) for every function?
A. Yes B. No
Mathematics