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 3 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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Solve the problem.Suppose that a radio transmission pattern can be modeled by 
for 
where the units are miles. Determine how far the signal reaches to the east, assuming that east is represented by the direction of the positive 
A. 360 miles B. 64,800 miles C. 32,400 miles D. 180 miles
Solve the problem. Round to the nearest cent.An accounts payable officer received a bill for $2957, dated July 3, with sales terms 2/10, n/30. Find the cash discount and amount due if the bill was paid July 23.
A. Cash discount: $59.14; net amount: $2897.86 B. Cash discount: $295.70; net amount: $2661.30 C. Cash discount: $29.57; net amount: $2927.43 D. Cash discount: $0; net amount: $2957
Evaluate the expression.-
- 
A. -23 B. -13 C. 23 D. 13
Consider the Venn diagram below. Find n((A ? B) ? C).
A. 31 B. 21 C. 13 D. 8 E. none of these