Solve the problem.Car A (travelling north at 30 mph) and car B (traveling west at 20 mph) are heading toward the same intersection. Car A is 6 miles from the intersection when car B is 8 miles from the intersection. Find parametric equations that describe the motion of cars A and B. 
A. Car A: x = 0, y = 30t - 6; Car B: x = 8 - 20t, y = 0
B. Car A: x = 0, y = 20t - 8; Car B: x = 30t - 6, y = 0
C. Car A: x = -30t + 6, y = 0; Car B: x = 8 - 20t, y = 0
D. Car A: x = 20t - 8, y = 0; Car B: x = 0, y = 6 - 30t
Answer: A
You might also like to view...
Substitute the value(s) for the variable(s) and then evaluate.(x + 3)2 - 2 ? 5; x = 4
A. 235 B. 39 C. 15 D. 115
A boat is pulled in by means of a winch located on a dock 
feet above the deck of the boat (see figure). Let ? be the angle of elevation from the boat to the winch and let s be the length of the rope from the winch to the boat. Write ? as a function of s.
?
?
A. 
B. 
C. 
D. 
E. 
Use properties of limits and algebraic methods to find the limit, if it exists.
?
?
A. 
B. -3
C. 
D. 
E. does not exist
Determine the values of the variable for which the expression is defined as a real number.
