Find all the first order partial derivatives for the following function.f(x, y) = 
A. 
= - 
; 
= - 
B. 
= 
; 
= 
C. 
= 
; 
= - 
D. 
= 
; 
= - 
Answer: D
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Solve the problem.Two forces, of 67.5 N and 47.2 N, forming an angle of 122.6°, act at the origin. Find the magnitude of the resultant force.
A. 114.7 lb B. 101.1 lb C. 57.9 lb D. 2700 lb
Find the values of p for which the series is convergent. Select the correct answer.
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Solve the problem.A balloon (in the shape of a sphere) is being inflated. The radius is increasing at a rate of 1 cm per second. Find a function, r(t), for the radius in terms of t. Find a function, V(r), for the volume of the balloon in terms of r. Find (V ? r)(t).
A. (V ? r)(t) = 
B. (V ? r)(t) = 
C. (V ? r)(t) = 
D. (V ? r)(t) = 