Solve the problem.The position of a projectile fired with an initial velocity v0 feet per second and at an angle ? to the horizontal at the end of t seconds is given by the parametric equations 
Suppose the initial velocity is 12 feet per second. Obtain the rectangular equation of the trajectory and identify the curve.
A. y = 
+ (cot ?)x; parabola
B. y = - 
+ (cot ?)x; hyperbola
C. y = - 
+ (tan ?)x; parabola
D. y = - 
+ (tan ?)x; ellipse
Answer: C
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Let z vary jointly with x and y. Find the constant of variation k. Then, use 
to find z when x = 5 and y = 7.z = 69,020 when x = 58 and y = 119
A. k = 
; z = 350
B. k = 10; z = 350
C. k = 10; z = 120
D. k = 
; z = 120
Find the hours, rate, or earnings as specified.
Find the number of regular hours, overtime hours (over 40), and overtime rate (time and a half).
A. 37.75, 8.75, $35.76 B. 40, 6.5, $35.76 C. 40, 6.5, $26.82 D. 46.5, 0, $26.82
Solve.A domed ceiling is a parabolic surface. For the best lighting on the floor, a light source is to be placed at the focus of the surface. If 1 m down from the top of the dome the ceiling is 28 m wide, find the best location for the light source.
A. 196 m down from the top B. 147 m down from the top C. 98 m down from the top D. 49 m down from the top
Use the number line to determine whether the statement is true or false. 
-3 < -5
A. True B. False