Solve the problem.A box with an open top is formed by cutting squares out of the corners of a rectangular piece of cardboard and then folding up the sides. If x represents the length of the side of the square cut from each corner, and if the original piece of cardboard is 19 inches by 15 inches, what size square must be cut if the volume of the box is to be 308 cubic inches? 
A. 11 in. by 11 in.
B. 1 in. by 1 in.
C. 7 in. by 7 in.
D. 4 in. by 4 in.
Answer: D
Mathematics
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Find the directrices of the hyperbola.x2 - y2 = 25
A. y = ± 
B. x = ± 
C. y = ± 5
D. x = ± 
Mathematics
Provide an appropriate response.Write the cube root of 64 using radical notation.
What will be an ideal response?
Mathematics
Find the area.
A. 1152 in.2 B. 924 in.2 C. 1224 in.2 D. 1848 in.2
Mathematics
Write standard notation for the number in the sentence.The volume of water in the lake is seven billion, eight hundred twenty-one million, ninety-four thousand, six hundred thirteen gallons.
A. 7,000,821,094,613 B. 7,821,094,613 C. 7,821,940,613 D. 782,194,613
Mathematics