Find an equation for the graph.
A. y = -3 cos (3x)
B. y = -3 cos 
C. y = -3 sin (3x)
D. y = 3 cos 
Answer: B
Mathematics
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Find the probability.One digit from the number 4,979,889 is written on each of seven cards. What is the probability of drawing a card that shows 4 or 8?
A. 
B. 
C. 
D. 
Mathematics
Use I = Prt for simple interest to find the indicated quantity.P = $13,500; t = 4 months; I = $517.50. Find r.
A. 11.7% B. 7.7% C. 3.8% D. 11.5%
Mathematics
Solve the equation.
= 
A. {- 3, 5}
B. 
C. {3, - 5}
D. ?
Mathematics
The function f is one-to-one. Find its inverse.f(x) = (x - 6)3
A. f-1(x) = 
+ 216
B. f-1(x) = 
+ 6
C. f-1(x) = 
+ 6
D. f-1(x) = 
- 6
Mathematics