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. 11,200 ft ? lb
B. 8750 ft ? lb
C. 12,425 ft ? lb
D. 9975 ft ? lb
Answer: D
Mathematics
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Evaluate the expression.71
A. 7
B. 1
C. -7
D. 
Mathematics
Provide an appropriate response.The life span of the average male human being is approximately 37,843,200 minutes. Write this number in scientific notation.
A. 37.8432 × 106 minutes B. 3.78432 × 107 minutes C. 3.78432 × 106 minutes D. 3.78432 × 105 minutes
Mathematics
If the following is a polynomial function, then state its degree and leading coefficient. If it is not, then state this fact.f(x) = 11x6 - 2x - 6
A. Degree: 6; leading coefficient: 11 B. Not a polynomial function. C. Degree: 7; leading coefficient: 11 D. Degree: 11; leading coefficient: 6
Mathematics
Solve.cot-1 x + cot-1 (1 + x) = 
A. x = ± 
B. x = 2
C. x = -5 + 3
D. x = 
Mathematics