Select the correct graph of the function.
?
?
A. 
B. 
C. 
D. 
E. 
Answer: D
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Sketch the graph of the parametric equations. Then set up the appropriate integral to find the length of the curve and use a computer to evaluate it.x = 2 sin t, y = 2 cos t, 0 ? t ? 2?
A. L = 5?
B. L = 5?
C. L = 2?
D. L = 4?
Solve the problem.A balloon (in the shape of a sphere) is being inflated. The radius is increasing at a rate of 5 cm per second. Find a function, r(t), for the radius in terms of t. Find a function, V(r), for the volume of the balloon in terms of r. Find (V ? r)(t).
A. (V ? r)(t) = 
B. (V ? r)(t) = 
C. (V ? r)(t) = 
D. (V ? r)(t) = 
Determine whether the function is one-to-one.f(x) = x2 + 2
A. One-to-one B. Not one-to-one
Solve the system of equations by the addition method.
A. (0, 7) B. (7, 0) C. (0, -7) D. (-7, 0)