Evaluate the expression without using a calculator. (Assume the variable represents a positive number.)
?
?
A. 
B. ?
C. ?
D. ?
E. ?
Answer: A
Mathematics
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Solve the problem.A solid right circular cylinder is bounded by the cylinder r = 2 and the planes z = 0 and z = 3. Find the moment of inertia about the z-axis if the density is ? = 4z.
A. 288? B. 36? C. 144? D. 96?
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Simplify the expression using the order of operations.
? -8 ÷ (-4)
A. -320 B. -20 C. 20 D. 320
Mathematics
Simplify the complex fraction.
A. 
B. 
C. 
D. 
Mathematics
Use the definition or identities to find the exact value of the indicated trigonometric function of the acute angle ?.cot ? = 
Find sin ?.
A. 
B. 
C. 
D. 3
Mathematics