Solve the equation algebraically. Verify your solution with a graphing utility.
+ 
= - 
A. 
B. 
C. 
D. 
Answer: B
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The scalar function div(grad f) = ? ? ? f (also written ?2f) is called the Lapalacian, and the function f satisfying ?2f = 0 is said to be harmonic. ?2f = fxx + fyy + fzz. Find ?2f for the following function and decide if it is harmonic.f(x, y, z) = (x3 + y2 + z)2
A. harmonic B. not harmonic
Solve the problem.Suppose that the velocity of a falling body is v = ks2 (k a constant) at the instant the body has fallen s meters from its starting point. Find the body's acceleration as a function of s.
A. a = 2k2s3 B. a = 2ks2 C. a = 2ks3 D. a = 2ks
Use the appropriate geometric formula from the following list to find the requested measure. 
The perimeter of a square with side of length 5 inches
A. 28 in. B. 21 in. C. 25 in. D. 20 in.
Find the axis of symmetry of the given function.y = 2x2 + 20x + 54
A. x = 4 B. x = -4 C. x = 5 D. x = -5