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
Answer: C
Mathematics
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Simplify.
A. - 
B. 
C. - 
D. - 
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If y varies directly as x, find the direct variation equation for the situation.y = 36 when x = 32
A. y = 4x
B. y = 
x
C. y = x + 4
D. y = 
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