The graph of a function f is given. Use the graph to answer the question.Find the numbers, if any, at which f has a local minimum. What are the local minima?
A. f has a local minimum at x = -2 and 2; the local minimum is 0
B. f has a local minimum at x = -2; the local minimum is 0
C. f has a local minimum at x = 0; the local minimum is 1
D. f has no local minimum
Answer: A
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for R
A. R = 
B. R = 
C. R = kEI
D. R = kE - I
Solve the problem.A building 220 feet tall casts a 70 foot long shadow. If a person looks down from the top of the building, what is the measure of the angle between the end of the shadow and the vertical side of the building (to the nearest degree)? (Assume the person's eyes are level with the top of the building.)
A. 19° B. 71° C. 18° D. 72°
Use Descartes's Rule of Signs to determine the possible number of positive and negative real zeros for the given function.f(x) = x4 - 6
A. 1 positive zero, 0 negative zeros B. 0 positive zeros, 1 negative zero C. 1 positive zero, 1 negative zero D. 0 positive zeros, 0 negative zeros
Graph the rational function.f(x) = 
A. 
B. 
C. 
D. 