Write the equation of the axis of symmetry.f(x) = -5x2 - 10x - 9
A. x = 1
B. x = -4
C. x = -1
D. x = 4
Answer: C
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Solve the problem.Determine a polynomial that represents the area of the figure. Leave ? in the answer.
A. 4?x2 + 9? B. 4x2 + 9 C. 4?x2 + 12?x + 9? D. 4x2 + 12x + 9
Solve and graph. Write the solution in interval notation.4 - 
> -4
A. 
B. 
? 
C. 
D. 
For the given function:(a) Find the intervals on which the function is increasing and decreasing. (b) Then identify the function's local extreme values, if any, saying where they are taken on.(c) Which, if any, of the extreme values are absolute?f(x) = xe-x/2
What will be an ideal response?
Solve the problem.Suppose you would like to cross a 205-foot wide river in a boat. Assume that the boat can travel 33 mph relative to the water and that the current is flowing west at the rate of 5 mph. If the bearing is chosen so that the boat will land at a point exactly across from its starting point, how long will it take for the boat to make the crossing? Give your answer to the nearest second.
A. 17 sec B. 9 sec C. 4 sec D. 2 sec