Solve the problem.Select an appropriate graph of a twice-differentiable function y = f(x) that passes through the points  , , (0,0),  and (,1), and whose first two derivatives have the following sign patterns.y' : y" : 

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A.

B.  

C.

D.

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Answer: A

Mathematics

Use a calculator to approximate the number. (Round your answer to three decimal places.)   ?

A. -1.666 B. 5.474 C. -5.474 D. 0.789 E. 5.605

Find . Express the answer in standard form.z1 = 5(cos 200° + i sin 200°)z2 = 4(cos 50° + i sin 50°)

A. -10 + 10i
B. -  + i
C. -2 + 2i
D. -  + i

Solve the problem.An investigating officer examining skid marks at the scene of an accident estimates the speed of the vehicle to have been 94 feet per second. Was the driver exceeding the 55 miles per hour speed limit?

A. Yes. The driver was traveling 64 mi/hr. B. No. The driver was traveling 53 mi/hr.

Find the angle between the given vectors to the nearest tenth of a degree.u = , v = 

A. 0° B. 45° C. 90° D. 180°