Solve the problem.Find the equation for the tangent plane to the surface 
at the point 
A. z = 0
B. x + y + z = 0
C. x - y = 0
D. x + y = 0
Answer: A
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If r(t) = 7i+t cos ?tj+4 sin ?tk, evaluate  Figure 3.png)
r(t)dt.
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Solve the problem.Two forces, F1 and F2, of magnitude 60 and 70 pounds, respectively, act on an object. The direction of F1 is 
and the direction of F2 is 
. Find the magnitude and the direction angle of the resultant force. Round the magnitude to the nearest hundredth of a pound and the direction angle to the nearest tenth of a degree.
A. 
= 99.37; ? = 93.7°
B. 
= 92.20; ? = 89.4°
C. 
= 94.63; ? = 87.2°
D. 
= 92.20; ? = 80°
The graph of a function is given. Decide whether it is even, odd, or neither.
A. even B. odd C. neither
Use a proportion to solve the application.A patient with a mass of 88 kilograms is to receive 1.7 milligrams per kilogram of metroprolol tartrate. How much of the drug should the patient receive?
A. 151.6 mg B. 86.3 mg C. 149.6 mg D. 89.7 mg