Match the surface show below to the graph of its level curves.
A. 
B. 
C. 
D. 
Answer: D
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Solve the problem. Round your answer, if appropriate.One airplane is approaching an airport from the north at 201 km/hr. A second airplane approaches from the east at 220 km/hr. Find the rate at which the distance between the planes changes when the southbound plane is 36 km away from the airport and the westbound plane is 20 km from the airport.
A. -283 km/hr B. -141 km/hr C. -424 km/hr D. -566 km/hr
Perform the operation by applying the standard order of operations for a series of calculations.($25 + $45 + $75 + $85) ÷ 5
A. $29 B. $46 C. $41 D. $51
Find a general term an for the geometric sequence.4, - 2, 1, - 
, 
, ...
A. an = 4 
n-1
B. an = 
n-1
C. an = 4 
n-1
D. an = 6 
n-1
Solve the problem.If a rocket is propelled upward from ground level, its height in meters after t seconds is given by h(t) = -9.8t2 + 49t. During what interval of time will the rocket be higher than 
A. 4 sec < t < 5 sec B. 0 sec < t < 2 sec C. 0 sec < t < 3 sec D. 2 sec < t < 3 sec