Find the equation of the parabola satisfying the given conditions. The vertex is at the origin.Directrix y = -2.6
A. x2 = 10.4y
B. y2 = 10.4x
C. x2 = -10.4y
D. y2 = -10.4x
Answer: A
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Find the gradient field F of the function f.f(x, y, z) = (x9y2 - y8z3)e-z2
A. F = 9x8y2e-z2i + (2x9y - 8y7z3)e-z2j + y2ze- z2[y6z(2z2 - 3) - 2x9]k B. F = 9x8y2i + (8y7z3 - 2x9y)j + (2z2 - 3)y8z2k C. F = 9x8y2e-z2i + (2x9y - 8y7z3)e-z2j + (3 - 2z2)y8z2e-z2k D. F = 9x8i + (8y7 - 2y)j + 2z4e-z2k
Perform the indicated operation or operations. Write the answer in simplest form. If the problem contains mixednumbers and the answer is an improper fraction, express the answer as a mixed number.
+ 
A. 
B. 
C. 
D. 
Solve.The distance an object falls when dropped from a tower varies directly as the square of the time it falls. If the object falls 144 feet in 3 seconds, how far will it fall in 12 seconds?
A. 2016 ft B. 2592 ft C. 2304 ft D. 192 ft
Evaluate the expression for the given replacement values.x ÷ y, for x = 413 and y = 0
A. 413
B. 
C. undefined
D. 0