Graph the ellipse.
+ 
= 1
A. 
B. 
C. 
D. 
Answer: D
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The position vector of a particle is r(t). Find the requested vector.The velocity at t = 3 for r(t) = (8 - 4t2)i + (9t + 7)j - e-6tk
A. v(3) = -24i + 9j - 6e-18k B. v(3) = -24i + 9j + 6e-18k C. v(3) = 24i + 9j + 6e-18k D. v(3) = -12i +9j + 6e-18k
If a projectile is fired with an initial speed of  figure 1.png)
ft/s at an angle ? above the horizontal, then its position after t seconds is given by the parametric equations x = ( figure 1.png)
cos?)t and y = ( figure 1.png)
sin?)t - 16t² where x and y are measured in feet. Suppose a gun fires a bullet into the air with an initial speed of 1024 ft/s at an angle of 30° to the horizontal. How far from the gun will the bullet hit the ground?
(a) 2.3 mi (b) 3.2 mi (c) 28.8 mi (d) 4.5 mi (e) 5.4 mi
Solve the problem.The population of cows C in a midwestern county during year x can be represented by 
where x is any year between 1 and 10 since the county started recording this information. Find the year when there were 49,000 cows symbolically by solving the equation 49,000 = 2600x + 36,000.
A. year 7 B. year 5 C. year 8 D. year 6
Find the vertex for the parabola whose equation is given.y = -3x2 + 30x - 9
A. (-5, -234)
B. 
C. (5, 66)
D. 