Determine the location of each local extremum of the function.f(x) = 
- 3x3 + 13x2 - 24x + 2
A. Local maxima at -2 and -4; local minimum at 3
B. Local maximum at 3; local minima at 2 and 4
C. Local maxima at 2 and 4; local minimum at 3
D. Local maximum at 2; local minimum at 4
Answer: B
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Solve the problem.Shown below is the table for clock addition in the 10-hour clock system. 
Find the inverse of 4 in the 10-hour clock system.
A. 5 B. 7 C. 16 D. 6
A woman walks due west on the deck of a ship at 6 mi/h. The ship is moving north at a speed of 21 mi/h. Find the speed of the woman relative to the surface of the water. Round the result to the nearest tenth.
What will be an ideal response?
Solve the system of equations by elimination.3x - 5y = -126x + 8y = -24
A. (-4, 0) B. (0, 4) C. (0, -4) D. (4, 0)
National Welding Company uses industrial robots in some of its assembly-line operations. Management has determined that the lengths of time in hours between breakdowns are exponentially distributed with probability density function 
.
?
What is the probability that a robot selected at random will break down between 400 and 500 hr of use? Round your answer to the nearest hundredth.
?
A. 0.06 B. ?0.30 C. ?0.15 D. ?0.79 E. ?0.51