Solve.x2 + 4x - 96 = 0
A. -12, 1
B. 12, -8
C. 12, 8
D. -12, 8
Answer: D
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Find k such that the function is a probability density function over the given interval.f(x) = kx2, -1 ? x ? 4
A. 
B. 
C. 
D. 
Solve.A rectangular metal sheet has an area of 156 square centimeters. Four squares with sides 2 cm are cut from the corners of the sheet, and the edges are bent upward to form an open box with a volume of 72 cubic centimeters. Find the dimensions of the box.
A. Length = 9 cm; width = 8 cm; height = 2 cm B. Length = 9 cm; width = 2 cm; height = 8 cm C. Length = 11 cm; width = 10 cm; height = 2 cm D. Length = 13 cm; width = 12 cm; height = 2 cm
Solve the problem.From a thin piece of cardboard 30 in. by 30 in., square corners are cut out so that the sides can be folded up to make a box. What dimensions will yield a box of maximum volume? What is the maximum volume? Round to the nearest tenth, if necessary.
A. 20 in. × 20 in. × 10 in.; 4,000 in3 B. 10 in. × 10 in. × 10 in.; 1,000 in3 C. 20 in. × 20 in. × 5 in.; 2,000 in3 D. 15 in. × 15 in. × 7.5 in.; 1,687.5 in3
Verify the identity.sin 
= 
(cos ? + sin ?)
What will be an ideal response?