Perform the indicated operation(s). Simplify if possible.
- 
+ 
A. 
B. 
C. 
D. 
Answer: C
Mathematics
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Solve the problem.Find the center of mass of the region of constant density bounded by the paraboloid 
and the xy-plane.
A. 
= 0, 
= 0, 
= 
B. 
= 0, 
= 0, 
= 
C. 
= 0, 
= 0, 
= 
D. 
= 0, 
= 0, 
= 
Mathematics
Use the order of operations to simplify the expression.
? 
+ 7
A. 
B. 
C. 
D. 
Mathematics
The height (in feet) of a certain kind of tree is approximated by 
where t is the age of the tree in years. Estimate the age of an 60-ft tree. Round your answer to the nearest hundredth.
?
A. 10.00 years B. 13.60 years C. 13.01 years D. 12.17 years
Mathematics
Use front end rounding to estimate the answer. Then use your estimate to select the correct exact answer.763.49 - 0.6
A. 7.6289 B. 762.89 C. 0.76289
Mathematics