Graph the function. Identify the vertex, x-intercepts, and the equation for the axis of symmetry.f(x) = -x2 + 2x + 3
A. 
vertex: (1, 4)
x-intercepts: (-3, 0) and (1, 0)
axis of symmetry: x = 1
B. 
vertex: (1, - 4)
x-intercepts: (-1, 0) and (3, 0)
axis of symmetry: x = 1
C. 
vertex: (- 1, 4)
x-intercepts: (-3, 0) and (1, 0)
axis of symmetry: x = - 1
D. 
vertex: (1, 4)
x-intercepts: (-1, 0) and (3, 0)
axis of symmetry: x = 1
Answer: D
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A. $1925.41 B. $1838.46 C. $1967.15 D. $967.15
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A. $32,310.04 B. $19,764 C. $33,143.09 D. $33,764.00
Find the first four nonzero terms in the Maclaurin series for the function.f(x) = x sin(2x)
A. 2x - 2x3 + 
x5 - 
x7 + . . .
B. 2x - 
x4 + 
x6 - 
x8 + . . .
C. 2x2 + 
x4 + 
x6 + 
x8 + . . .
D. 2x2 - 
x4 + 
x6 - 
x8 + . . .
Determine whether the function is a solution of the wave equation.w(x, t) = ex - ct
A. No B. Yes