Solve the problem.A rectangular piece of cardboard measuring 23 inches by 27 inches is to be made into a box with an open top by cutting equal size squares from each corner and folding up the sides. Let x represent the length of a side of each such square. For what value of x will the volume be a maximum? If necessary, round to 2 decimal places.
A. 15.56
B. 25.08
C. 4.13
D. 12.54
Answer: C
Mathematics
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Evaluate. Simplify if possible.
+ 
A. 
B. 
C. 
D. 
Mathematics
Add or subtract as indicated. Write your answer in the form a + bi.[(4 + 3i) - (5 + 6i)] - (10 - 7i)
A. 19 + 4i B. -11 + 2i C. -11 + 4i D. 19 + 2i
Mathematics
Evaluate as requested.Given that f(x) = x2 + 2x - 5, find f(-4).
A. 13 B. 29 C. 19 D. 3
Mathematics
Solve.2x1/2 - 3x1/4 - 2 = 0
A. 2, - 
B. 16
C. -2, -1
D. 16, 
Mathematics