The width w (in millimeters) of successive growth spirals of the sea shell Catapulus voluto, shown in the illustration, is given by the function 
, where n is the spiral number. To the nearest tenth of a millimeter, find the width of the second spiral.
?
?
A. 8.4 mm
B. 3.1 mm
C. 2.5 mm
D. 4.2 mm
E. 11.4 mm
Answer: D
Mathematics
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A. q = 0.000080
B. q = 0.000080
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D. q = 0.000080
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A. 
B. 7
C. 
D. 
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Mathematics