Solve the problem.For the geometric sequence 2, 1, 
, 
, ... , find an.
A. an = 2n-2
B. an = 21-n
C. an = 
1-n
D. an = 
n-2
Answer: D
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Solve the problem.The ratio of the lengths of strings that play the notes D and B is 27 to 16. If a string 32 cm long plays a B, what is the length of the string that plays a D?
A. 32 cm B. 48 cm C. 54 cm D. 59 cm
Provide an appropriate response.Determine whether a linear or quadratic function would be a more appropriate model for the graphed data. If linear, tell whether the slope should be positive or negative. If quadratic, decide whether the coefficient of x2 should be positive or negative. DENTAL FLOSS USE 
Years since 2000
A. Quadratic; negative B. Linear; positive C. Linear; negative D. Quadratic; positive
Give the center and radius of the circle. Then sketch its graph.(x + 1)2 + (y - 2)2 = 9
A. center (1, 2), r = 3
B. center (- 1, 2), r = 3
C. center (1, - 2), r = 3
D. center (- 1, - 2), r = 3
Find the amplitude or period as requested.Find the period of y = -3 sin 
.
A. 
B. 2?
C. 3?
D. 4?