Evaluate the expression.0 - (-2)
A. 4
B. 0
C. -2
D. 2
Answer: D
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Provide an appropriate response.Why is absolute value always non negative?
What will be an ideal response?
Use the absolute value to express the distance between the points with coordinates a and b on the number line. Then determine this distance by evaluating the absolute value expression.a = 10 and b = 5
A. 
= -5
B. 
= 15
C. 
= 5
D. 
= 3
Use the graph, along with the indicated points, to give the solution set of the equation or inequality.In the graph below y1 = -2
and y2 = -4.Use the graph to solve -2
? -4
A. (-?, 1) ? (5, ?) B. (1, 5) C. [1, 5] D. (-?, 1] ? [5, ?)
Use calculus to find any critical points and inflection points of the given function. Then determine the concavity of the function and the intervals over which it is increasing/decreasing.f(x) = e-(1/4)x
A. Critical points: critical point at x = 0 Inflection points: none Concavity: concave up for all real numbers Increasing: increasing for all x < 0 and decreasing for all x > 0 B. Critical points: none Inflection points: point of inflection at x = 0 Concavity: concave down for all x < 0 and concave up for all x > 0 Decreasing: decreasing for all real numbers C. Critical points: none Inflection points: none Concavity: concave up for all real numbers Decreasing: decreasing for all real numbers D. Critical points: none Inflection points: none Concavity: concave down for all real numbers Decreasing: decreasing for all real numbers