Solve the problem.The gravitational force (in lb) of attraction between two objects is given by 
where x is the distance between the objects. If the objects are 15 ft apart, find the work required to separate them until they are 75 ft apart. Express the result in terms of k.
A. 
k
B. 
k
C. 
k
D. 
k
Answer: B
Mathematics
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Answer the question.f(x) = 
Is f continuous at x = 0?
A. Yes B. No
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Factor by grouping.5y - 35 + xy - 7x
A. (x - 7)(y + 5) B. (y - 7)(5 + x) C. (x - 7)(5y + x) D. (y - 7x)(5 + x)
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Identify the number as prime, composite, or unit.73
A. Unit B. Composite C. Prime
Mathematics
Use a graphing calculator to find the value of the determinant.
A. 22 B. -22 C. 142 D. -2
Mathematics