Find all values of x (if any) where the tangent line to the graph of the function is horizontal.y = 2 + 8x - x2
A. 8
B. 4
C. -4
D. -8
Answer: B
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Decide whether the slope is positive, negative, zero, or undefined.
A. Undefined B. Positive C. Negative D. Zero
Solve the problem.A plane takes off from an airport on the bearing S29°W. It continues for 20 minutes then changes to bearing 
and flies for 2 hours 20 minutes on this course then lands at a second airport. If the plane' s speed is 420 mph, how far from the first airport is the second airport? Round your answer correct to the nearest mile.
A. 1011 mi B. 1111 mi C. 1010 mi D. 1110 mi
Fill in the blank with one of the words or phrases listed below. 
Use the facts below. 2 ? 3 = 6
4 + 17 = 21
20 - 9 = 11
The 3 above is called a(n) 
.
A. divisor B. addend C. factor D. dividend
Solve the problem.For the geometric sequence 2, 1, 
, 
, ... , find an.
A. an = 2n-2
B. an = 21-n
C. an = 
1-n
D. an = 
n-2