Find the second-order partial derivative.Find fxy when f(x, y) = xy2 + yex2 + 5.
A. 2y + 2xex2
B. 2yex2
C. y + xex2
D. 2xex2
Answer: A
You might also like to view...
Find the length of the vector given the initial and terminal points.
; A(-7, 10), B(-5, 15)
A. 29
B. 
C. 
D. -3
Plot the ordered pair. State in which quadrant or on which axis the point lies.(-2, -4)
A. quadrant III
B. quadrant II
C. quadrant IV
D. quadrant III
Add.0.287 + 8.1
A. 8.377 B. 8.387 C. 8.388 D. 8.497
This exercise is based on the following information, gathered from student testing of a statistical software package called MODSTAT. Students were asked to complete certain tasks using the software, without any instructions. The results were as follows. (Assume that the time for each task is normally distributed.) It can be shown that if X and Y are independent normal random variables with means 
and
src="https://sciemce.com/media/2/ppg__cognero__9.5_Normal_Distributions__media__8307352f-2871-4242-8b8c-f520d6281ef2.PNG" style="vertical-align:middle;" /> and standard deviations 
and 
respectively, then their sum 
is also normally distributed and has mean 
and standard deviation 
. Assuming that the time it takes a student to complete each task is independent of the others, find the probability that a student will take at least 20 minutes to complete both Tasks 3 and 4. Round your answer to four decimal places.
TaskMean Time(minutes)StandardDeviationTask 1: Descriptive Analysis of Data11.45.0Task 2: Standardizing Scores11.99.0Task 3: Poisson Probability Table7.54.1Task 4: Areas Under Normal Curve9.55.9?
A. 0.3382
B. ?0.6638
C. ?0.6764
D. ?0.3372
E. ?0.6628