Describe the graph using another equation.y = cos 
- cos 
A. -cos x
B. -2sin x
C. -2cos x
D. -sin x
Answer: B
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Translate the percent problem to a proportion using x for the unknown value. Do not solve the proportion.116% of what is 85?
A. 
= 
B. 
= 
C. 
= 
D. 
= 
Use the accompanying graph of a particle moving on a coordinate line with velocity v = f(t) in ft/sec at time t seconds. The axes are marked off at one-unit intervals. Use these terms to describe the motion state: moving forward/backward, increasing/decreasing speed, and resting. Recall that speed = 
. 
Give the interval(s) when the particle is moving backward.
A. (8, 11) and (19, 21) B. (8, 21) C. (11, 19) D. (0, 8) and (21, 25)
Complete the table and use the result to find the indicated limit.If f(x) = 
, find 
f(x).
A. 
; limit = ?
B. 
; limit = 5.10
C. 
; limit = 1.20
D. 
; limit = 4.0
Multiply and then, if possible, simplify by factoring.
A. 9
B. 
C. 3
D. 