For problems 1-13, simplify each expression.
A. 
B. 
C. 
D. 
E. none of these
Answer: B
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Compute the gradient of the function at the given point.
A. ?f = - 
i - 
j
B. ?f = 
i + 
j
C. ?f = - 
i - 
j
D. ?f = - 
i - 
j
Find the measure of the dihedral angle indicated.The figure shown is a right prism whose bases are regular hexagons. Find the measure of the dihedral angle between adjacent lateral faces.
A. 120° B. 135° C. 60° D. 90°
Subtract.(3.1x3 - 6.1x2 + x - 4) - (8.1x3 - 2.7x2 + x + 1)
A. 11.2x3 - 3.4x2 - 5 B. -5x3 - 3.4x2 - 2x + 5 C. -5x3 - 8.8x2 + 2x - 5 D. -5x3 - 3.4x2 - 5
Determine whether the graph is that of a function. If it is, use the graph to find its domain and range, the intercepts, if any, and any symmetry with respect to the x-axis, the y-axis, or the origin.
A. function domain: {x|x = 6 or x = -8} range: all real numbers intercept: (-8, 0) symmetry: x-axis B. function domain: all real numbers range: {y|y = 6 or y = -8} intercept: (0, -8) symmetry: none C. function domain: all real numbers range: all real numbers intercept: (0, -8) symmetry: none D. not a function