Solve.A box is made from a rectangular piece of metal with length 21 inches and width 11 inches. The box has no top. 
Write an expression that gives the outside surface area of the box.
A. 462 - 64x
B. 64x + 231
C. 231 - 4x2
D. 4x2 + 231
Answer: C
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Find the slope of the curve for the given value of x.y = x2 + 5x, x = 4
A. slope is - 
B. slope is 
C. slope is 13
D. slope is -39
Find the vertices of the hyperbola.36(y + 5)2 - 9(x + 3)2 = 324
A. (-3, 5) and (9, 5) B. (-3, -2) and (-3, -8) C. (3, 8) and (3, 2) D. (-9, -5) and (3, -5)
Solve the problem.At time t ? 0, the velocity of a body moving along the s-axis is 
When is the body's velocity increasing?
A. t > 10 B. t > 5.5 C. t < 5.5 D. t < 10
Solve the problem.A square yard has a 6-foot wide sidewalk around a square lawn. The sides of the yard, including the sidewalk, have length y. Evaluate for y = 60, the polynomial that gives the area of the sidewalk.
A. 864 B. 1296 C. 1584 D. 684