Solve.The function 
models the duration of a storm, f(x), in hours, in terms of the diameter of the storm, x, in miles. Use a calculator to determine the duration of a storm with a diameter of 12 miles. Round to the nearest hundredth.
A. 41.57 hr
B. 0.77 hr
C. 0.24 hr
D. 2.91 hr
Answer: D
Mathematics
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7 =
A. 13 
- 8
B. 13
C. 13 
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D. 13 
+ 8
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