Solve the equation by completing the square.x2 - 2x - 24 = 0
A. {±2i
}
B. {-6, 4}
C. {-20, -4}
D. {6, -4}
Answer: D
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For the curve r(t), write the acceleration in the form aTT + aNN.r(t) = (4t sin t + 4 cos t)i + (4t cos t - 4 sin t)j + 9k
A. a = 4T + 
N
B. a = 4tN
C. a = 4T + 4tN
D. a = 
N
Solve the problem.The floor plan of a building is shown in the figure below. Starting outside, is it possible to walk through each door exactly once, and end up back outside? Justify your answer.
What will be an ideal response?
Add or subtract as indicated.(r + 5s - 3) + (-5r + s) + (s - 2)
A. -4r + 7s - 5 B. -6r + 7s - 5 C. -5r + 5s - 5 D. -4r + 6s - 5
Solve the problem.The table shows the number of deaths due to car accidents in a certain city in various years. 
Let n = f(t) be the number of deaths due to car accidents at t years since 2012. Use a quadratic model to predict the number of deaths due to car accidents in the year 2019. (First find a quadratic equation for f in vertex form by using the data for the years 2015 and 2017).
A. 88 B. 66 C. 237 D. 134