Solve the problem.A conical tank is resting on its apex. The height of the tank is 
, and the radius of its top is 
. The tank is full of gasoline weighing
How much work will it take to pump the gasoline to the top? Give your answer to the nearest ft ? lb.
A. 412,240 ft ? lb
B. 137,413 ft ? lb
C. 11,130,474 ft ? lb
D. 15,268 ft ? lb
Answer: B
Mathematics
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Solve the problem.Suppose 
is a mathematical model for actual time as a function of estimated time, where f(x) represents actual time and x represents estimated time and m and b are constants. If 
and b = -2, find f(x) when x is 120 min.
A. 254 min B. 115.8 min C. 124.2 min D. 250 min
Mathematics
Solve using matrices.x - 5y = -4x + 8y = -4
A. (0, 4) B. (-4, 0) C. (4, 0) D. (0, -4)
Mathematics
Solve.What number is 17
% of 47?
A. 8
B. 
C. 810
D. 81
Mathematics
Find the root. If the root is not a real number, so state.
A. 6 B. 36 C. not a real number D. -6
Mathematics