Sketch the indicated graph.A missile is fired at an airplane and is always directed toward the airplane. An equation that describes the distance r between a missile and an airplane is 
where ? is the angle between their directions at all times. Sketch the graph of this equation for 
A. 
B. 
C. 
D. 
Answer: B
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The position vector of a particle is r(t). Find the requested vector.The velocity at t = 0 for r(t) = cos(4t)i + 2ln(t - 9)j - 
k
A. v(0) = -4i - 
j
B. v(0) = 4i - 
j
C. v(0) = -
j
D. v(0) = 
j
Find the function represented by the power series. 
A. 
B. 
C. - 
D. - 
Find the first term and the common difference of the arithmetic sequence described. Give a formula for the nth term of the sequence.4th term is 8; 6th term is 18
A. a = -2; d = 5; an = 5n - 7 B. a = 7; d = -5; an = 5n + 12 C. a = -7; d = 5; an = 5n - 12 D. a = -2; d = 5; an = -7n + 5
Solve the problem. Assume projectile is ideal, launch angle is measured from the horizontal, and launch is over a horizontal surface, unless stated otherwise.What two angles of elevation will enable a projectile to reach a target 
downrange on the same level as the gun if the projectile's initial speed is 
Assume there is no wind resistance.
A. 0.02° and 89.98° B. 29.69° and 60.31° C. 59.38° and 30.62° D. 29.69°