Solve the problem.Find the work done lifting a 209-pound weight 16 feet into the air.
A. 334.4 foot-pounds
B. 13.1 foot-pounds
C. No work is done
D. 3344 foot-pounds
Answer: D
Mathematics
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Find the indicated vector.Let u = 
. Find -2u.
A. 
B. 
C. 
D. 
Mathematics
Find the potential function f for the field F.F = sec2 x sin2 yi + 2 tan x sin y cos yj + 9z8k
A. f(x, y, z) = sec x sin2 y + z9 + C B. f(x, y, z) = sec x sin2 y + z + C C. f(x, y, z) = -sec x sin2 y + z9 + C D. f(x, y, z) = tan x sin2 y + z9 + C
Mathematics
Simplify.
? 
? 18
A. 
B. 1
C. 2
D. 
Mathematics
Solve the equation.9x - 13 + 2x = 7x + 1 - 5x
A. 
B. - 
C. 
D. - 
Mathematics