Round the mixed number to the nearest integer.-8
A. 8
B. -9
C. -8
D. -8
Answer: C
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Solve.From a 15-inch by 15-inch piece of metal, squares are cut out of the four corners so that the sides can then be folded up to make a box. Let x represent the length of the sides of the squares, in inches, that are cut out. Express the volume of the box as a function of x. Graph the function and from the graph determine the value of x, to the nearest tenth of an inch, that will yield the maximum volume.
A. 2.3 inches B. 2.5 inches C. 2.8 inches D. 3.1 inches
Use a product-to-sum identity to rewrite the expression.cos 
sin 
A. 0.5
B. 0.5
C. 0.5
D. 0.5
Evaluate the expression by hand.274/3
A. 2187 B. 243 C. 729 D. 81
Perform the indicated operation. If possible, simplify.Multiply:
A. cos2 x - sin2 x - 1 B. cos2 x - sin x + 1 C. 2cos2 x + cos x - 1 D. 2cos2 x - cos x - 1