Solve the problem.On her way to a holiday weekend, Nancy drove 1
hours in rush-hour traffic. When traffic eased up, she was able to increase her speed by 40 miles per hour and drove another 4
hours. If the entire trip was 324 miles, how fast did she drive in rush-hour traffic?
A. 25
mph
B. 25 mph
C. 26 mph
D. 24 mph
Answer: D
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Solve the problem.Two tracking stations are on the equator 120 miles apart. A weather balloon is located on a bearing of 
from the western station and on a bearing of N19°W from the eastern station. How far is the balloon from the western station? Round to the nearest mile.
A. 138 miles B. 99 miles C. 129 miles D. 90 miles
Solve the problem.A balloon (in the shape of a sphere) is being inflated. The radius is increasing at a rate of 4 cm per second. Find a function, r(t), for the radius in terms of t. Find a function, V(r), for the volume of the balloon in terms of r. Find (V ? r)(t).
A. (V ? r)(t) = 
B. (V ? r)(t) = 
C. (V ? r)(t) = 
D. (V ? r)(t) = 
Graph the list of numbers on the given number line.-3, - 2
, - 
, 
, 3
A.
- 2 ? | -  ? |  |
B.
- 2 ? | -  ? |  |
C.
 ? | -  ? | - 2 |
D.
 ? | -  ? | - 2 |
Determine whether the origin is an attractor, repellor, or a saddle point of the dynamical system xk+1 = Axk, where A is given below. Determine the direction of greatest attraction or repulsion, appropriately.A = 
A. Attractor; direction of greatest attraction: along the line through 0 and 
B. Repellor; direction of greatest repulsion: along the line through 0 and 
C. Attractor; direction of greatest attraction: along the line through 0 and 
D. Saddle point; direction of greatest attraction: along the line through 0 and 
, direction of greatest repulsion: along the line through 0 and 