Identify ? and ? in the following expression which is the right side of the formula for cos (? - ?).cos 
cos 
+ sin 
sin 
A. ? = 
, ? = 
B. ? = - 
, ? = 
C. ? = 
, ? = 
D. ? = 
, ? = - 
Answer: C
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Solve the problem.The motion of an imaginary ball bouncing along a flat, level surface, such that each bounce is identical in peak height and horizontal velocity to the bounce before it, is modeled by the following functional relationship between the instantaneous height, f(x), of the ball above the flat surface and the horizontal position, x, of the ball along the surface:
Find ao, two nonzero cosine terms (if they exist), and two nonzero sine terms (if they exist) of the Fourier series for this description of motion.
A. f(x) = 
- 4
B. f(x) = 
- 
C. f(x) = 
- 
D. f(x) = 
+ 
From a 
-lb package of ground beef, a 
-lb hamburger was made. How much ground beef is left in the package?
A. 
lb
B. 
lb
C. 
lb
D. 
lb
Without using a graphing calculator, match the graph with its equation. h(x) = -2.4(1.3)x
A. 
B. 
C. 
D. 
Simplify the expression. Use positive exponents. Assume variables represent nonzero real numbers.
A. 
B. 
C. y9
D. 