Find the partial derivative.Let z = f(x,y) = 9x2 - 11xy + 4y3. Find 
.
A. 18x - 11y
B. 18x + 11y2
C. -11x - 12y
D. -11x + 12y2
Answer: A
Mathematics
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Use grouping symbols to clarify the meaning of the symbolic statement.p ? r ? q ? p ? r
A. (p ? r) ? [q ? (p ? r)] B. [p ? (r ? q)] ? (p ? r) C. p ? [(r ? q) ? (p ? r)] D. [(p ? r) ? q] ? (p ? r)
Mathematics
Use De Moivre's theorem to evaluate the expression. Write the result in standard form.(4(cos 15° + i sin 15°))4
A. 256i
B. 128 + 128 i 
C. 128 
+ 128 i
D. 128 + 128 i
Mathematics
Solve the problem.Determine a polynomial that represents the area of the figure.
A. 9t2 + 9t + 9 B. 6t2 + 18t + 6 C. 9t2 + 9 D. 9t2 + 18t + 9
Mathematics
Graph the equation by plotting points.y = x3 + 1
A. 
B. 
C. 
D. 
Mathematics