Find the inverse function.
Mathematics
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Solve the problem.A construction crane lifts a bucket of sand originally weighing 
at a constant rate. Sand is lost from the bucket at a constant rate of
. How much work is done in lifting the sand 
? (Neglect the weight of the bucket.)
A. 9600 ft ? lb B. 8700 ft ? lb C. 7800 ft ? lb D. 6900 ft ? lb
Mathematics
Find projv u.v = k, u = 2i + 6j + 9k
A. 
k
B. 
i + 
j + 
k
C. 9k
D. 
i + 
j + 
k
Mathematics
A project consists of seven independent tasks with processing times (in hours) given by 4, 5, 6, 7, 8, 9, and 12.Find the optimal finishing time Opt for N = 2 processors.
A. Opt = 27 hours B. Opt = 24 hours C. Opt = 25 hours D. Opt = 23 hours E. Opt = 26 hours
Mathematics
Factor the polynomial completely.x2 - x - 72
A. (x + 1)(x - 17) B. (x + 9)(x - 8) C. (x + 8)(x - 9) D. (x - 9)(x + 9)
Mathematics