Perform the operations.
?
Fill in the blank(s) with the appropriate word(s).
50
Mathematics
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Solve the problem.The area of a circle with radius r is given by the function A(r) = ?r2. Find the area of the base of a circular storage tank if the radius is 5 feet long. Use ? ? 3.14.
A. 78.5 square feet B. 15.7 square feet C. 31.4 square feet D. 75 square feet
Mathematics
Solve the problem.Find the center of mass of the region of density 
bounded by the paraboloid 
and the xy-plane.
A. 
= 0, 
= 0, 
= 6
B. 
= 0, 
= 0, 
= 2
C. 
= 0, 
= 0, 
= 
D. 
= 0, 
= 0, 
= 3
Mathematics
Add or subtract.-
- 
A. - 10
B. 12
C. - 12
D. - 11
Mathematics
Evaluate the logarithm, if possible. Round the answer to four decimal places.log 0.00474
A. -2.3335 B. -2.3242 C. -5.3517 D. -2.3152
Mathematics