Find the axis of symmetry of the given function.f(x) = -3x2 + 8x
A. x = 
B. x = - 
C. x = -4
D. x = - 2
Answer: A
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Set up a definite integral that gives the arc length of the given curve.x = 
, y = 3t2, 1 ? t ? 3
A. 
B. 
C. 
D. 
Solve the problem.An open (no top) box has height h and a square base with side length s. Its total surface area is 800 cm2. Find ds/dh in terms of s and h.
A. 
= 
B. 
= 
C. 
= 
D. 
= -2 - 
Graph the parabola.y2 = -6x
A. 
B. 
C. 
D. 
Solve the problem.Cory and Melissa are racing electronic cars around a circular track. They begin at the same time going in the same direction. Cory's car completes a revolution in 40 seconds, while Melissa's car completes a revolution in 35 seconds. How long will it take them before both cars reach the starting point again simultaneously?
A. 560 sec B. 280 sec C. 112 sec D. 56 sec