Find the second-order partial derivative.Find fyy when f(x, y) = 8xexy.
A. 16x2exy
B. 8x3exy
C. 16x2ex
D. 8x3ex
Answer: B
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Solve the problem.For a certain drug, the rate of reaction in appropriate units is given by 
where t is measured in hours after the drug is administered. Find the total reaction to the drug from 
to 
A. 5.17 B. 11.35 C. 9.96 D. 4.98
Solve the absolute value inequality. Write your answer in interval notation.
? 8
A. 
B. 
C. 
D. 
? 
Use the graph of f to evaluate each expression.f(1), f(0)
A. -5, -4 B. -3, 4 C. -3, -4 D. -5, 4
Solve the problem.An airplane flies on a compass heading of 90.0° at 310 mph. The wind affecting the plane is blowing from 332° at 40.0 mph. What is the true course and ground speed of the airplane? Round results to an appropriate number of significant digits.
A. 87°, 346 mph B. 96°, 345 mph C. 87°, 329 mph D. 96°, 331 mph