Solve the problem.The normal monthly precipitation (in inches) for August is listed for 20 different U.S. cities. Find the average of the data.
A. 3.27 in.
B. 2.80 in.
C. 2.94 in.
D. 3.09 in.
Answer: C
Mathematics
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Find the value of d2y/dx2 at the point defined by the given value of t.x = 7 sin t, y = 7 cos t, t = 
A. 
B. -2
C. 2
D. - 
Mathematics
Use a sum or difference identity to find the exact value.sin 
A. 
B. 
C. 
D. 
Mathematics
Find the circumference or area of the circle, as requested. Give an exact answer (in terms of ?) and an approximation using 3.14 for ?. If necessary, round to two decimal places.Find the area.
A. ? m2; 18.84 m2 B. 2.25? m2; 7.07 m2 C. 3? m2; 42.39 m2 D. 9? m2; 14.13 m2
Mathematics
Add or subtract. Simplify the answer.
- 
A. 
B. 
C. 
D. 
Mathematics