Find dy.y = cos(9
)
A. 
dx
B. 
dx
C. 
dx
D. 
dx
Answer: A
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In order to determine the effects of a new high carbohydrate diet intended to treat depression, a researcher conducts a study. Five hundred inmates in the Middletown prison are selected to participate in the study. The researcher puts the 400 inmates not in solitary confinement on the new diet. The 100 inmates in solitary confinement are given their regular meals. The 400 inmates on the new diet are not aware that they being studied or that their diet has been modified, but have many fewer reported cases of depression after 30 days.Which of the following statements is true?
A. The study is not blind experiment. B. The study is a double-blind experiment. C. The study is a blind experiment, but not a double-blind experiment. D. The study is a double-blind experiment, but not a blind experiment. E. All of these statements are true.
Find the vertex and axis of symmetry of the graph of the function.f(x) = -x2 - 4x
A. (4, -2); x = 4 B. (-2, 4); x = -2 C. (2, -4); x = 2 D. (-4, 2); x = -4
Identify the conic section represented by the equation.2x2 + 3y2 - 4x + 18y - 25 = 0
A. circle B. parabola C. ellipse. D. hyperbola
Solve the problem.A jet plane traveling at a constant speed goes 1200 mi with the wind, then turns around and travels for 1000 mi against the wind. If the speed of the wind is 50 mph and the total flight took 4 hr, find the speed of the plane.
A. 525 mph B. 605 mph C. 550 mph D. 435 mph